April 12, 2019. EN. Indonesia : Agung , Kurile Islands : Ebeko , Colombia : Cumbal , Mexico : Popocatepetl , Guatemala : Fuego .

April 12 , 2019.

 

 

Indonesia , Agung :

VOLCANO OBSERVATORY NOTICE FOR AVIATION – VONA.

Issued: April 11 , 2019 
Volcano: Agung (264020)
Current Aviation Colour Code: ORANGE
Previous Aviation Colour Code: orange
Source: Agung Volcano Observatory
Notice Number: 2019AGU15
Volcano Location: S 08 deg 20 min 31 sec E 115 deg 30 min 29 sec
Area: Bali, Indonesia
Summit Elevation: 10054 FT (3142 M)

 

Volcanic Activity Summary:
Eruption with volcanic ash cloud at 10h47 UTC (18h47 local). Eruption and ash emission is not continuing.

Volcanic Cloud Height:
Best estimate of ash-cloud top is around 16454 FT (5142 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer.

Other Volcanic Cloud Information:
Ash-cloud moving to west

Remarks:
Seismic activity is characterized by volcanic earhquake

Information on the eruption of G. Agung, April 11, 2019.

The eruption of Mount Agung occurred on April 11, 2019 at 18:47 with the height of the ash column observed at ± 2,000 m above the summit (± 5,142 m above sea level). The column of ash was gray, of thick intensity and inclined towards the West. This eruption was recorded on a seismogram of maximum amplitude of 25 mm and a duration of ± 2 minutes 8 seconds. A low roar was heard from the Rendang station.

Currently, G. Agung is at Level III (SIAGA) with recommendations:
Communities around Mount Agung and mountaineers / visitors / tourists must not climb or carry out any activity in the estimated risk zone within 4 km of Mount Agung. The estimated risk area is dynamic and continues to be evaluated. It can be modified at any time to follow the most recent G. Agung observation data.
Communities that live and move around rivers that are downstream of Gunung Agung are sensitized to potential secondary hazards in the form of lahar descent that can occur especially during the rainy season and if the eruption material is still exposed in the area of the summit.

Source : Magma Indonésie, PVMBG .

Photos : Peter rendez vous ( Archives ) , Telkom indonesia .

 

Kurile Islands , Ebeko :

50.69 N, 156.01 E;
Elevation 3792 ft (1156 m)
Aviation Colour Code is ORANGE

A moderate eruptive activity of the volcano continues. Ash explosions up to 19,700 ft (6 km) a.s.l. could occur at any time. Ongoing activity could affect low-flying aircraft and airport of Severo-Kurilsk.
A moderate explosive activity of the volcano continues. According to visual data by volcanologists from Severo-Kurilsk, explosions sent ash up to 2.2 km a.s.l. on 09 April. Satellite data by KVERT shows the volcano was obscured by clouds.

Source : Kvert

Photo :  roskosmos

 

Colombia, Cumbal :

Weekly activity bulletin of the volcanic complex of Cumbal.
The level of activity of the volcano continues at the level: YELLOW LEVEL ■ (III): CHANGES IN THE BEHAVIOR OF THE VOLCANIC ACTIVITY.

Following the activity of the CUMBAL VOLCANIC COMPLEX, the COLOMBIAN GEOLOGICAL SERVICE (SGC) reports that:

For the period evaluated between April 2 and 8, 2019, seismic activity was maintained at values similar to those reported in previous periods, from 316 to 334 earthquakes. The events associated with the fracture of solid materials inside the volcano were scattered in the area of influence of the Cumbal volcanic complex at depths less than 2 km from its summit (4700 m altitude) and a magnitude less than 0.1 on the Richter scale.


Favorable climatic conditions made it possible to observe gas emissions coming mainly from the El Verde fumarol field north-northeast of the volcanic complex. These emissions were white, of low height and of direction variable according to the action of the winds.

The COLOMBIAN GEOLOGICAL SERVICE is attentive to the evolution of the volcanic phenomenon and will continue to inform in a timely manner of the observed changes.

Source : SGC

 

Mexico , Popocatepetl :

April 11, 11:00 am (April 11, 16:00 GMT)

In the last 24 hours, thanks to the monitoring systems of the Popocatépetl volcano, 16 exhalations have been identified, some of which accompanied by volcanic gases and light amounts of ash.
In addition, yesterday at 11:19, an episode of tremor began, accompanied by an emission of ashes, generating a column of a maximum height of 1 km above the crater, which dispersed mainly South-South-East . Is. A total of 110 minutes of low amplitude tremor were recorded.

Since the afternoon of yesterday and during the early hours of this morning, a slight emission of volcanic gases has been observed, which has spread north-east, which continues until this moment.

On April 8, with the support of the Federal Police (PF), experts from the National Center for Disaster Reduction (CENAPRED) and the Institute of Geophysics of the National Autonomous University of Mexico (UNAM), flew of recognition, to evaluate the conditions of the crater Popocatepetl.

During the overflight, it was not possible to corroborate or rule out the presence of a new lava dome due to intense cloudiness, in addition to high vapor and gas emissions in the crater area . However, monitoring of the Popocatépetl volcano is carried out continuously over 24 hours. Any change of activity will be reported quickly.

It should be noted that since December 1, 2018, nine overflights have already been made, providing more accurate and up-to-date data on the volcano. The determination to fly over is derived from the risk analysis previously performed to determine crew safety conditions. Analyzing the videos of the explosions, it was determined that the ballistic fragments reached a height of between 500 m and one kilometer in about 8 to 10 seconds and that their horizontal range was 1 to 3 km.


The flight takes place at 20 000 feet (about 6 100 m altitude), that is to say more than 1 km above the crater floor, and obliquely not to be above that of the crater. -this. The pilot knows that if an explosion is detected, he must immediately change the route to get away from the volcano quickly.

CENAPRED urges NOT to approach the volcano and especially the crater, because of the danger of falling ballistic fragments, and in case of heavy rains to stay away from ravine bottoms due to the danger of mudslides and debris.

The Popocatepetl volcanic alert semaphore is located in PHASE 3 YELLOW.

Source : Cenapred
Photos : Cenapred , Felipe Pérez Fotoblog.

 

Guatemala , Fuego :

Type of activity: Vulcanian
Morphology: Composite Stratovolcano
Geographical location: 14 ° 28’54˝ Latitude N; 90 ° 52’54˝Longitude W.
Height: 3,763 meters above sea level.
Weather conditions: Clear
Wind: from the west at 5 km / h
Precipitation: 2.1 mm

 

Activity:
Presence of degassing fumarole of white color. The volcano observatory and the seismic stations record between 18 and 22 explosions between weak, moderate and a little strong per hour that expel columns of gray ash at a height of 4500 – 4800 m (14765-15750 feet) scattered over 15 to 20 km to the east, at night and early morning, incandescent impulses were observed at an altitude of 200 to 300 m with weak to moderate avalanches on the contour of the crater towards the ravines of Seca, Taniluya, Ceniza Trinidad, Las Lajas and Honda. In the Seca Canyon, a lava flow is observed 500 meters long. Some explosions generate moderate rumblings that cause shock waves that cause vibrations in the roofs of homes near the volcano. It is also possible to hear sounds similar to those of train locomotives with an interval of 15 minutes, causing the fall of fine ash particles in Alotenango, Ciudad Vieja, La Reunión. There is a probability of ash falling in Antigua Guatemala.

Source : Insivumeh

Photo : elinformador.com

 

December 19 , 2018. EN. Japan : Kuchinoerabu , Russia / Kurils Islands : Ebeko , Colombia : Chiles / Cerro Negro , Philippines : Mayon , Hawaii : Kilauea .

December 19 , 2018.

 

Japan , Kuchinoerabu :

Volcano erupts on Kuchinoerabu Island , Japan .
Japan’s Meteorological Agency says a volcano erupted on Kuchinoerabu Island in the southwestern prefecture of Kagoshima on Tuesday.
Mount Shindake erupted explosively shortly after 4:30 PM.

A column of volcanic ash rose 2,000 meters into the air, and large rocks were seen spewing from the crater.
A pyroclastic flow reached a distance of about one kilometer down the western slope. It is the first such flow to be observed there since May of 2015, when all residents were evacuated.
Mount Shindake has been erupting sporadically since October.
The agency is keeping its eruption alert level at three on a scale of one to five.

Officials are warning residents to be on the alert for volcanic rocks and pyroclastic flows within two kilometers of the crater and some other areas.

Source : www3.nhk.or.jp

Video : Toru Takenouchi  via Sherine France.

 

Russia / Kurils Islands , Ebeko :

VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA).

Issued: December 18 , 2018 
Volcano:Ebeko (CAVW #290380)
Current aviation colour code:ORANGE
Previous aviation colour code:orange
Source:KVERT
Notice Number:2018-121
Volcano Location:N 50 deg 41 min E 156 deg 0 min
Area:Northern Kuriles, Russia
Summit Elevation:3791.68 ft (1156 m)


Volcanic Activity Summary:
A moderate explosive activity of the volcano continues. Visual data from Severo-Kurilsk showed an explosion sent ash up to 2.5 km a.s.l., an ash plume is extending to the north from the volcano.
A moderate eruptive activity of the volcano continues. Ash explosions up to 19,700 ft (6 km) a.s.l. could occur at any time. Ongoing activity could affect low-flying aircraft and airport of Severo-Kurilsk.

Volcanic cloud height:
7544-8200 ft (2300-2500 m) AMSL Time and method of ash plume/cloud height determination: 20181218/0254Z – Visual data
Other volcanic cloud information:
Distance of ash plume/cloud of the volcano: 3 mi (5 km)
Direction of drift of ash plume/cloud of the volcano: N
Time and method of ash plume/cloud determination: 20181218/0254Z – Visual data

Source : Kvert.

Photo : ‎Кирилл Баканов

 

Colombia, Chiles / Cerro Negro :

Weekly activity bulletin of volcanoes Chiles and Cerro Negro.
The activity level of the volcanoes is maintained at the level: YELLOW LEVEL ■ (III): CHANGES IN THE BEHAVIOR OF THE VOLCANIC ACTIVITY.

As a result of the CHILE and CERRO NEGRO volcano activity, the COLOMBIAN GEOLOGICAL SERVICE (SGC) reports that:

Compared to the previous period, between 11 and 17 December 2018, the seismic activity in the region of Chiles – Cerro Negro volcanoes recorded a decrease in its occurrence and energy, from 8731 to 2855 earthquakes, all associated with fracturing the rock inside the volcanic building.

 

The vast majority of hypocentres were located southwest of the summit of Chiles volcano to epicentral distances of 4 km and depths between 3 and 6 km below the summit (4700 m altitude). A fracture earthquake with a local magnitude of M 3.0 is highlighted, reported as experienced on December 14 at 14:57 local time, located at a depth of 7 km and at a distance of 14 km in the south. East from the summit of Chiles Volcano. The swarm of fracture-type earthquakes since December 3 has shown a gradual downward trend in recent weeks.

The Colombian geological service and the GEOPHYSICAL INSTITUTE OF THE NATIONAL POLITECHNIC SCHOOL OF ECUADOR closely monitor the evolution of this seismic activity and the volcanic phenomenon and inform in a timely manner about the detected changes.

Source : SGC

Photo : P Ramon.

 

Philippines , Mayon :

MAYON VOLCANO BULLETIN 19 December 2018 08:00 A.M.

Mayon Volcano’s seismic monitoring network recorded two (2) volcanic earthquakes during the past 24 hours. One of these is related to an ash emission event that generated a brownish ash plume starting at 4:55 PM yesterday. This event lasted for 30 seconds based on seismic record. Moderate emission of white steam-laden plumes that crept downslope before drifting south-southwest was observed. Sulfur dioxide (SO2) emission was measured at an average of 1,377 tonnes/day on 30 November 2018. Precise leveling data obtained on 08-13 December 2018 indicate a slight inflation of the edifice relative to 22-31 October 2018. The volcano generally remains inflated relative to 2010 baselines. Electronic tilt data further show pronounced inflation of the mid-slopes beginning 25 June 2018, possibly due to aseismic magma intrusion deep beneath the edifice.

Alert Level 2 currently prevails over Mayon Volcano. This means that Mayon is at a moderate level of unrest. DOST-PHIVOLCS reminds the public that sudden explosions, lava collapses, pyroclastic density currents or PDCs and ashfall can still occur and threaten areas in the upper to middle slopes of Mayon. DOST-PHIVOLCS recommends that entry into the six kilometer-radius Permanent Danger Zone or PDZ and a precautionary seven kilometer-radius Extended Danger Zone or EDZ in the south-southwest to east-northeast sector, stretching from Anoling, Camalig to Sta. Misericordia, Sto. Domingo must be strictly prohibited. People residing close to these danger areas are also advised to observe precautions associated with rockfalls, PDCs and ashfall. Civil aviation authorities must advise pilots to avoid flying close to the volcano’s summit as airborne ash and ballistic fragments from sudden explosions and PDCs may pose hazards to aircrafts.

Source : Phivolcs.

Photo : Auteur inconnu.

 

Hawaii , Kilauea :

19°25’16 » N 155°17’13 » W,
Summit Elevation 4091 ft (1247 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

Activity Summary:
Kīlauea Volcano is not erupting. Rates of seismicity, deformation, and gas release have not changed significantly over the past week. Deformation signals are consistent with refilling of the middle East Rift Zone.

Observations:
HVO monitoring during the past week showed no significant changes. Low rates of seismicity at the summit and East Rift Zone (ERZ) continue, with events occurring primarily at Kīlauea’s summit and Kīlauea’s south flank areas, totaling around 220 detected earthquakes in those areas since last check. In the ERZ, tiltmeters showed little change over the last week, with GPS indicating minor inflation downrift from Puʻu ʻŌʻō. Sulfur dioxide emission rates have been below detection limits in the LERZ since early September, though minor amounts of volcanic gas are still present. Sulfur dioxide emission rates were last measured at ~35 t/d at both the summit and ERZ, consistent with the past few months of emissions from Kīlauea.Hazards are still present in the LERZ eruption area and at the Kīlauea summit. Residents and visitors near recently active fissures and lava flows should stay informed, heed Hawaii County Civil Defense and National Park warnings, and be prepared, if necessary, to self-evacuate in the unlikely event of renewed activity. Please note that Hawaii County maintains a closure of the entire flow field and the vents and prohibits access to the area unless authorized through Civil Defense.

The Hawaiian Volcano Observatory (HVO) continues to closely monitor Kīlauea’s seismicity, deformation, and gas emissions for any sign of reactivation, and maintains visual surveillance of the summit and the East Rift Zone. HVO will continue to issue a weekly update (every Tuesday) and additional messages as warranted by changing activity.

Source : HVO

Photo : Bruce Omori .

November 20 , 2018. EN. Guatemala : Fuego , Peru : Sabancaya , Alaska : Veniaminof , Russia / Northern Kurils Islands : Ebeko .

November 20 , 2018.

 

 

 

Guatemala , Fuego :

VOLCANOLOGICAL SPECIAL BULLETIN BEFGO # 214-2018 ERUPTION, Guatemala 19 November 2018, 08h30 (local time).

Type of activity: Vulcanian
Morphology: Composite Stratovolcano
Location: 14 ° 28’54˝ Latitude N; 90 ° 52’54˝Longitude W.
Height: 3,763msnm.

The eruption of the Fuego volcano continues with a high range of activities, pyroclastic flows were generated in the Barrancas Seca, Las Lajas and Honda. The eruption is accompanied by strong and constant explosions, with a thick column of ash maintained at an approximate height of 7000 m of altitude dispersing towards the West and the South-West. The ash dispersal reaches 50 to 60 km, moderate to strong avalanches towards the canyons of Ceniza, Taniluyá and Seca, with distances leading to the edge of the vegetation. The incandescent source rises 800 – 1000 m above the crater, the ballistic materials are scattered more than a kilometer around the crater.

 

 

The explosions generate moderate to loud rumblings that rattle the homes to the west and southwest, more than 15 km from the volcano. Currently, ash particles fall abundantly into the regions of Panimache II, Santa Sofia, Sangre de Cristo, Finca Palo Verde, San Pedro Yepocapa, etc. Lava flows are generated, the longest having an approximate length of 3,000 m towards the Ceniza Canyon, two small ones about 300 m in the direction of the Las Lajas and Honda ravines. Their front part generate avalanches and ash rising.
As the eruption continues to increase, the possibility of pyroclastic flows that can be channeled mainly in the Seca, Taniluyá, Ceniza, Las Lajas and Honda ravines, as well as in the other ravines of the Fuego volcano, is not excluded. you must not stay near or inside ravines where volcanic products descend.

SPECIAL VULCANOLOGICAL BULLETIN BEFGO No. 217-2018. END OF ERUPTION. Guatemala 19 November 2018, 18:00 (local time).

The fifth eruption of the Fuego volcano ended. There are constant low to moderate explosions, a column of ash at an approximate height of 4,800 meters (15,748 feet), traveling 15 km to the west and southwest. This causes the ashes to fall to Panimaché, El, Porvenir, Morelia, Santa Sofia, Sangre de Cristo, Finca Palo Verde, San Pedro Yepocapa, among others.

 

Incandescent impulses are observed in the crater at an approximate height of 100 to 300 meters, causing weak to moderate avalanches on the crater contour, some reaching long distances to the vegetation towards the main ravines.
This eruption lasted 32 hours, lava flows and pyroclastic flows appeared. It is therefore possible to observe remains of lava flows during the night and early in the morning towards Ceniza Canyon, as well as fine particles in suspension.

Source : Insivumeh.

Video : Carmen Morataya de Rehnberg. Rudy Giron .

 

Peru , Sabancaya :

An average of 20 Explosions / day was recorded. The activity associated with fluid movements (long-period types) continues to predominate. Earthquakes associated with the rise of magma (hybrid types) remain very few and low energy. 
The columns of gas and eruptive ash reached a maximum height of 3000 m above the crater. The dispersion of these materials occurred within a radius of about 40 km, mainly to the northwest, southwest and south.


 

The volcanic gas flow (SO2) recorded on November 13 a maximum value of 3000 tons / day, a value considered important. 
The deformation of the surface of the volcanic building presented important variations. 
The MIROVA satellite system recorded 7 thermal anomalies, with values between 3 and 43 MW VRP (Radiated Volcano Energy).

In general, eruptive activity maintains moderate levels. No significant changes are expected in the coming days.

Source : IGP

Photo : Photovolcanica.

 

Alaska , Veniaminof :

56°11’52 » N 159°23’35 » W,
Summit Elevation 8225 ft (2507 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Veniaminof volcano continues to erupt with effusion of a lava flow from the cone in the ice-filled summit caldera, and continuous, low-amplitude seismic tremor. Clear satellite views of the volcano over the past day showed strongly elevated surface temperatures from the active lava effusion. Web camera images showed incandescence from the lava emission overnight and a minor plume above the vent in daytime images.

 

Diffuse ash and steam emissions continue and trace ashfall is possible in nearby communities under favorable wind conditions.

Veniaminof volcano is monitored with a local real-time seismic network, which will typically allow AVO to detect changes in unrest that may lead to a more significant explosive eruption. Rapid detection of such an event would be accomplished using a combination of seismic, infrasound, lightning, and satellite data.

Source : AVO.

Photo : Finley, Zachary , 09 Novembre 2018.

 

Russia / Northern Kurils Islands , Ebeko :

VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) .

Issued: November 19 , 2018.
Volcano:Ebeko (CAVW #290380)
Current aviation colour code:ORANGE
Previous aviation colour code:orange
Source:KVERT
Notice Number:2018-111
Volcano Location:N 50 deg 41 min E 156 deg 0 min
Area:Northern Kuriles, Russia
Summit Elevation:3791.68 ft (1156 m)

Volcanic Activity Summary:
A moderate explosive activity of the volcano continues. Visual data from Severo-Kurilsk showed an explosion sent ash up to 2-2.3 km a.s.l., an ash plume is extending to the north from the volcano.

This moderate eruptive activity of the volcano continues. Ash explosions up to 19,700 ft (6 km) a.s.l. could occur at any time. Ongoing activity could affect low-flying aircraft and airport of Severo-Kurilsk.

Volcanic cloud height:
6560-7544 ft (2000-2300 m) AMSL Time and method of ash plume/cloud height determination: 20181119/2223Z – Visual data

Other volcanic cloud information:
Distance of ash plume/cloud of the volcano: 3 mi (5 km)
Direction of drift of ash plume/cloud of the volcano: N
Time and method of ash plume/cloud determination: 20181119/2223Z – Visual data

Source : Kvert

Photo : L. Kotenko, IVS FEB RAS

 

 

 

November 11 , 2018. EN. Chile : Lascar , Mexico : Popocatepetl , Alaska : Semisopochnoi , Russia / Kuriles Islands : Ebeko , Japan / Ryukyu Islands : Kuchinoerabujima .

November 11 , 2018.

 

 

Chile , Lascar :

During the evaluated period, a total of 151 seismic events were recorded, of which 11 were classified as volcano-tectonic earthquakes (VT) in relation to rock fracturing processes inside the volcanic structure. with local magnitudes lower than M 1.8. The larger event was located 1.8 km south-southwest of the active crater at a depth of 7.6 km.
140 long-period (LP) type earthquakes were also recorded in relation to fluid dynamics within the volcano with reduced displacement values (DRc) of less than 1.2 cm2.

 

The images provided by the IP cameras installed around the volcano show a recurrent degassing from the main crater, reaching a maximum of 650 m above the active crater. Through some images, there are periods of incandescence of low intensity.

According to data provided by two GNSS stations, there is a shortening of approximately 0.7 cm, recorded during the month of September, of the surveillance line that crosses the crater, without increase in magnitude, which could indicate a slight deflation punctual and non-persistent in time, which had started during the period previously evaluated.

Sulfur dioxide (SO2) emissions, recorded by Differential Absorption Spectrometry Equipment (DOAS), have a value for the evaluated period of 471 +/- 76 T / day and a maximum value of 1137 t / d recorded on October 13th. SO2 emissions are at moderate levels for this volcano.

 


 

8 thermal warnings were reported in the area associated with the volcanic complex during the period, with a maximum MVRP of 1.3 MW, values considered low, according to the data processed by infrared observation. Volcanic Activity (MIROVA) (http://www.mirovaweb.it/) and Temporal Thermal Monitoring of Global Hot Spots (MODVOLC) (http://modis.higp.hawaii.edu/).

The level of activity presented during the period considered is considered to be in the basic level

Because of the above, the volcanic warning is kept at the level:
GREEN LEVEL: Active volcano with stable behavior – Probable time for eruption: MONTH / YEARS.

Observation:
A zone of danger is considered as an area of 500 m around the crater.

Source : Sernageomin

Photo : Sernageomin ,  Gerard Prins ( Wikipédia).

 

Mexico , Popocatepetl :

November 10, 11:00 am (November 10, 17:00 GMT)

In the last 24 hours, through the surveillance systems of the Popocatepetl volcano, 166 exhalations have been identified, accompanied by water vapor, gas and light amounts of ash. The most important took place yesterday at 18:40 and today at 17:45, 19:38 and 20:23.

At the time of writing, there was little visibility due to clouds. However, in the last few hours, there was steam and gas emission in the Southeast direction.

CENAPRED urges NOT to APPROACH the volcano and in particular the crater, because of the risk of falling ballistic fragments and in case of heavy rains, to move away from the bottom of the ravines because of the risk of landslides and mudslides.

The traffic light of the Popocatepetl volcano is located at Amarillo Phase 2.

Source : Cenapred .

Photo : Archive Webcamdemexico.

 

Alaska , Semisopochnoi :

51°55’44 » N 179°35’52 » E,
Summit Elevation 2625 ft (800 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE


Unrest continues at Semisopochnoi volcano. Three possible small explosions were detected in infrasound data yesterday evening between 4:51 and 5:04 UTC (19:51-20:04 AKST). No associated ash clouds were observed in partly cloudy satellite views. Additional explosions are possible and will likely occur without warning. The satellite link that transmits seismic data from Semisopochnoi failed on November 1, but an infrasound array on Adak Island should still detect significant explosive emissions from Semisopochnoi (with a 13-minute delay) if atmospheric conditions permit.

Semisopochnoi is monitored with an on-island seismic network, though this is currently off-line, and remotely by satellite and lightning sensors. As noted above, an infrasound array on Adak Island may detect explosive emissions from Semisopochnoi with a 13 minute delay if atmospheric conditions permit.

Source : AVO

Photo : AVO

 

Russia / Kuriles Islands , Ebeko :

VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA).

Issued: November 10 , 2018.
Volcano:Ebeko (CAVW #290380)
Current aviation colour code:ORANGE
Previous aviation colour code:orange
Source:KVERT
Notice Number:2018-110
Volcano Location:N 50 deg 41 min E 156 deg 0 min
Area:Northern Kuriles, Russia
Summit Elevation:3791.68 ft (1156 m)

 

Volcanic Activity Summary:
A moderate explosive activity of the volcano continues. Visual data from Severo-Kurilsk showed an explosion sent ash up to 4.5 km a.s.l., an ash plume is extending to the south-east from the volcano.
A moderate eruptive activity of the volcano continues. Ash explosions up to 19,700 ft (6 km) a.s.l. could occur at any time. Ongoing activity could affect low-flying aircraft and airport of Severo-Kurilsk.

Volcanic cloud height:
13120-14760 ft (4000-4500 m) AMSL Time and method of ash plume/cloud height determination: 20181110/0012Z – Visual data
Other volcanic cloud information:
Distance of ash plume/cloud of the volcano: 6 mi (10 km)
Direction of drift of ash plume/cloud of the volcano: SE
Time and method of ash plume/cloud determination: 20181110/0012Z – Visual data

Source : Kvert.

Photo :  Sputnik . Alexandre Peraguis.

 

Japan /Ryukyu Islands , Kuchinoerabujima :

30.443°N, 130.217°E
Elevation 657 m

JMA reported that during 31 October-5 November there were very small events recorded at Kuchinoerabujima’s Shindake Crater. Plumes rose 500-1,200 m above the crater rim. The Alert Level remained at 3 (on a scale of 1-5).

 

 

A group of young stratovolcanoes forms the eastern end of the irregularly shaped island of Kuchinoerabujima in the northern Ryukyu Islands, 15 km west of Yakushima. The Furudake, Shindake, and Noikeyama cones were erupted from south to north, respectively, forming a composite cone with multiple craters. The youngest cone, centrally-located Shintake, formed after the NW side of Furutake was breached by an explosion. All historical eruptions have occurred from Shintake, although a lava flow from the S flank of Furutake that reached the coast has a very fresh morphology. Frequent explosive eruptions have taken place from Shintake since 1840; the largest of these was in December 1933. Several villages on the 4 x 12 km island are located within a few kilometers of the active crater and have suffered damage from eruptions.

Source: Agence météorologique japonaise (JMA), GVP.

Video : 民宿 宇美河(うみかわ via Sherine France.

 

 

November 04 , 2018. EN. Chile : Puyehue – Cordon Caulle , Russia / Kurils Islands : Ebeko , Mexico : Popocatepetl , United States : California Volcanoes .

November 04 , 2018.

 

 

Chile , Puyehue – Cordon Caulle : 

Special Report on Volcanic Activity (REAV), Los Rios Region, Puyehue-Cordon Caulle Volcano, 03 November 2018, 4:00 am Local Time (Mainland Chile).

The National Geological and Mining Service of Chile (Sernageomin) publishes the following PRELIMINARY information, obtained from monitoring equipment of the National Volcanic Monitoring Network (NVRN), processed and analyzed at the Volcanological Observatory of the Southern Andes (OVDAS) :

Today, Saturday, November 03, 2018, between 1:21 and 2:50 am Local time, the monitoring stations installed near the Puyehue-Cordon Caulle volcanic complex recorded a seismic swarm of 120 events associated with a fracturing process of rocks (Volcano-tectonic type) , located 1.8 km north of the emission center of the year 2011.

 

 

The characteristics of the larger magnitude event, after its analysis, are as follows:

TIME OF ORIGIN: 01h26 Local time (04h26 UTC)
LATITUDE: 4.5085 ° S
LONGITUDE: 72.1392 ° W
DEPTH: 3.8 KM
LOCAL MAGNITUDE: 2.4 (ML)

OBSERVATIONS:
At the time of this report, events of similar characteristics of lower magnitude were recorded. The event was not confirmed as felt by the population.
The level of volcanic technical alert remains at the level: Green.

Sernageomin continues online monitoring and will inform in a timely manner about any changes observed.

Source : Sernageomin.

Photo : Mono DiezdelPunta ( Wikiloc)

 

Russia / Kurils Islands , Ebeko :

50.69 N, 156.01 E;
Elevation 3792 ft (1156 m)
Aviation Colour Code is ORANGE

The Ebeko volcano on the Paramushir island, located in the Russain Kuril Islands archipelago, spewed out a column of ash to a height of 4.5 kilometers (2.8 miles), the press service of the Russian Emergencies Ministry’s department in the Far Eastern Sakhalin Region said in a statement on Sunday, Sputnik reported.
« On November 4, the emergencies control center of the Russian Emergencies Ministry’s department in the Sakhalin Region received information that the Ebeko volcano was seen throwing ash to a height of up to 4.5 kilometers. The plume of ash has moved to the north-east of the volcano, to a distance up to five kilometers, » the statement read.

The town of Severo-Kurilsk, located seven kilometer away from the volcano, had not experienced ash fall, the statement added.

Explosive eruption of Ebeko volcano at 01:16 UTC on 10 December, 2016.

The situation is not threatening the lives of local residents, according to the statement.
Ebeko woke up in 2016 and has repeatedly thrown ash since then.

A moderate eruptive activity of the volcano continues. Ash explosions up to 19,700 ft (6 km) a.s.l. could occur at any time. Ongoing activity could affect low-flying aircraft and airport of Severo-Kurilsk.

A moderate explosive activity of the volcano continues. According to visual data by volcanologists from Severo-Kurilsk, explosions sent ash up to 3.7 km a.s.l. all week; ash clouds drifted to the different directions from the volcano; ashfalls were noted in Severo-Kurilsk on 29-31 October. Satellite data by KVERT showed a thermal anomaly over the volcano on 27 and 29 October.

Source : en.trend.az , Kvert .

Photo : L. Kotenko, IVS FEB RAS

 

Mexico , Popocatepetl :

During the past 24 hours, 118 exhalations have been identified through the surveillance systems of the Popocatépetl volcano. For most of this report, the weather was overcast and visibility was not available; however, these visible exhalations were accompanied by water vapor, gas, and light amounts of ash. In addition, seven minutes of low amplitude tremor were recorded. During the night, there was partial visibility towards the volcano and no incandescence was observed. At the time of writing this report, the volcano is partially visible. Any event will be scattered in the Northeast direction.


 

CENAPRED insists that the volcano, and in particular the crater, should not be approached, because there is the risk of falling ballistic fragments and, in the event of heavy rains, to move away from the bottom of the ravines due to landslides. field and mudslides.

The Volcanic Alert traffic light from Popocatepetl is located at Amarillo Phase 2.

Source : Cenapred.

Photo : LBZ

 

United-States ,  California Volcanoes :

Current Volcano Alert Level: all NORMAL
Current Aviation Color Code: all GREEN

Activity Update: All volcanoes monitored by CalVO using telemetered, real-time sensor networks exhibit normal levels of background seismicity and deformation. Volcanoes monitored include Mount Shasta, Medicine Lake Volcano, Clear Lake Volcanic Field, Lassen Volcanic Center, Long Valley Volcanic Region, Coso Volcanic Field, Ubehebe Craters, and Salton Buttes.

Ubehebe craters.

 

Observations for October 1, 2018 (0000h PST) through October 31, 2018 (2359h PDT):

Mt Shasta: One earthquake at or above M1.0 was detected, registering M1.69.
Medicine Lake: One earthquake at or above M1.0 was detected, registering M1.21.
Lassen Volcanic Center: No earthquakes at or above M1.0 were detected.
Clear Lake Volcanic Field: Two earthquakes at or above M1.0 were detected, with the largest event registering M1.44. [Note: The typical high level of seismicity was observed under the Geysers steam field located at the western margin of CLVF. The largest event was M3.35].
Long Valley Volcanic Region: In Long Valley Caldera, 14 earthquakes of M1.0 or greater were detected, with the largest event registering M1.78. One earthquake at or above M1.0 was detected in the Mono Craters region (M1.56). Three earthquakes at or above M1.0 were detected under Mammoth Mountain. The largest event registered M1.46. [Note: The typical high level of seismicity was observed south of the caldera in the Sierra Nevada range. The largest event registered M2.28].
Ubehebe Craters: No earthquakes at or above M1.0 were detected.
Salton Buttes: Twenty-seven earthquakes of M1.0 or greater were detected, with the largest registering M2.85.
Coso Volcanic Field: Ten earthquakes of M1.0 or greater were detected, with the largest registering M1.99.

The U.S. Geological Survey will continue to monitor these volcanoes closely and will issue additional updates and changes in alert level as warranted.

Source : Calvo

November 02 , 2018. EN. Russia / Central Kuriles : Sarychev Peak , Colombia : Cumbal , United-States : Yellowstone , Guatemala : Fuego .

November 02 , 2018.

 

 

Russia / Central Kuriles , Sarychev Peak :

VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA).

Issued: November 01 , 2018 
Volcano:Sarychev Peak (CAVW #290240)
Current aviation colour code:YELLOW
Previous aviation colour code:orange
Source:KVERT
Notice Number:2018-108
Volcano Location:N 48 deg 5 min E 153 deg 12 min
Area:Central Kuriles, Russia
Summit Elevation:4906.88 ft (1496 m)

Volcanic Activity Summary:
A moderate gas-steam activity of the volcano continues. According to satellite data, a thermal anomaly over the volcano was noted last time on 15 October, 2018, and ash explosions – on 10 October, 2018. The volcano was quiet or obscured by clouds on 16-31 October. KVERT continues to monitor Sarychev Peak volcano.

A moderate gas-steam activity of the volcano continues. The danger of ash explosions up to 32,800-49,200 ft (10-15 km) a.s.l. is remain. Ongoing activity could affect international and low-flying aircrafts.

Volcanic cloud height:NO ASH CLOUD PRODUSED
Other volcanic cloud information:NO ASH CLOUD PRODUSED

Source : Kvert.

Photo :  A. Rybin, IMGG FEB RAS , 7/2009

 

Colombia , Cumbal :

Weekly Cumbal Volcano Activity Bulletin
The level of activity of the volcano is maintained at the level: LEVEL YELLOW ■ (III): CHANGES IN THE BEHAVIOR OF THE VOLCANIC ACTIVITY

Following the activity of the CUMBAL VOLCANIC COMPLEX, the COLOMBIAN GEOLOGICAL SERVICE (SGC) reports that:

Between October 23 and 29, 2018, there was an increase in seismicity associated with fluid movements and rock fracturing of the volcanic building. Despite this increase, the energy released by these earthquakes continues at levels considered low for the Cumbal volcano.

The seismicity associated with rock fracturing (volcano-tectonic earthquakes) was located near the La Plazuela crater (north-east of the Cumbal volcanic complex), at depths not exceeding 4 km from at the top (4700 m) and local magnitudes less than 0.5 on the Richter scale.

It was possible to observe gas emission columns coming from the El Verde fumarole field (North-East of the volcanic complex), white in color, at low pressure and at a low height, oriented in a dispersed manner in the direction of winds.

The COLOMBIAN GEOLOGICAL SERVICE is attentive to the evolution of the volcanic phenomenon and will continue to inform in a timely manner of the detected changes.

Source : SGC.

 

United-States , Yellowstone :

44°25’48 » N 110°40’12 » W,
Summit Elevation 9203 ft (2805 m)
Current Volcano Alert Level: NORMAL
Current Aviation Color Code: GREEN

Recent work and news
Steamboat geyser continued its pattern of near-weekly water eruptions during the month of October, with activity on October 8, 15, 23, and 31. There have now been 25 total Steamboat water eruptions in 2018. In the Upper Geyser Basin, activity at the new feature that formed on Geyser Hill in mid-September was very low throughout October. Field work during the past month was mostly aimed at preparing monitoring stations for the winter — for example, the 12-station semi-permanent GPS network was removed in early October. Those instruments will be reinstalled in May 2019.

Seismicity
During October 2018, the University of Utah Seismograph Stations, responsible for the operation and analysis of the Yellowstone Seismic Network, located 68 earthquakes in the Yellowstone National Park region. The largest event was a micro earthquake of magnitude 2.7 located about 14 miles east-southeast of West Thumb, WY, on October 21, at 03:06 PM MDT.

No swarm activity occurred during the month of October.

Yellowstone earthquake activity remains at background levels.

Ground deformation
Surface deformation recorded by GPS stations in the Yellowstone region is following the overall pattern of the past several months: uplift near the Norris Geyser Basin and subsidence of the caldera, all at rates of a few centimeters per year.

The Yellowstone Volcano Observatory (YVO) provides long-term monitoring of volcanic and earthquake activity in the Yellowstone National Park region. Yellowstone is the site of the largest and most diverse collection of natural thermal features in the world and the first National Park. YVO is one of the five USGS Volcano Observatories that monitor volcanoes within the United States for science and public safety.

Source : YVO

 

Guatemala , Fuego :

SPECIAL BEFGO VULCANOLOGICAL BULLETIN No. 190-2018 INCREASE ACTIVITY Guatemala October 31, 2018 at 11:30 am (local time)

Type of activity: Vulcanienne
Morphology: Composite stratovolcan
Location: 14 ° 28’54˝Latitude N; 90 ° 52’54˝Longitude W.
Height: 3,763msnm.

In the last few hours, the seismic activity recorded by the Fuego Volcano stations has increased in number and energy of explosions. The OVFGO Volcano Observatory reports moderate and some strong explosions, expelling gray ash columns of 4,400 and 4,700 meters above sea level. (14,435 to 15,419 feet) moving west and southwest over a distance of approximately 15 kilometers. Ash falls are reported on the villages of Sangre de Cristo, Morelia, Santa Sofia and San Pedro Yepocapa.

The explosions generate moderate and strong shock waves, accompanied by rumblings, sensitive to 25 km on the southwest flank, and west of the volcanic complex. The activity also causes constant avalanches of blocks along the slopes of the volcano, some of which reach the vegetation. The seismic recordings of stations around the volcano, note explosions, tremors, avalanches. There is a probability of generating lava flows in the next hours or days.

Source : Insivumeh

Photo : Archive inconnue.

 

September 18 , 2018. EN. La Réunion : Piton de la Fournaise , Aleutians Islands : Semisopochnoi , Peru : Sabancaya , Japan : Azumayama , Kurils Islands : Sarychev Peak .

September 18 , 2018.

 

 

La Réunion , Piton de la Fournaise : 

Activity Bulletin from Monday 17 September 2018 at 09:00 (local time)

The eruption that began September 15 at 4:25 am local time continues. The volcanic tremor (indicator of surface eruptive intensity) has been stable and weak since 18:00 on 15 September (14:00 UT).

Figure 1: Evolution of the RSAM (indicator of the volcanic tremor and the intensity of the eruption) between 04:00 (00h UTC) on September 15 and 09:08 (05:08 UTC) September 17 on the seismic station of FOR, located near the Château-fort crater (2000 m altitude to the southeast of the summit).

Fourteen volcano-tectonic earthquakes were recorded beneath the summit craters during the day of September 16th.
– The SO2 emissions recorded by the OVPF’s permanent sensors are much higher than the atmospheric background (related to the volcanic gas plume), and are mostly dispersed west and south since early morning, but are still noticeable at Mountain peak.

– No deformation is noticeable since the beginning of the eruption.
– The surface flows estimated from satellite data, via the HOTVOLC platform (OPGC – University of Auvergne), are between 2.5 and 5 m3 / s for the start of the day on 17 September.
– During the night, the lava flow continued mainly in the southernmost channel. A visual recognition from Bert’s piton will be made today to try to assess the position of the flow front.

 

Activity Bulletin from Monday 17 September 2018 at 17:30 (local time)

The eruption that began September 15 at 4:25 am local time continues. The volcanic tremor (indicator of surface eruptive intensity) has been stable and weak since 18:00 on 15 September (14:00 UT).

– The SO2 emissions recorded by the OVPF’s permanent sensors are much higher than the atmospheric background (related to the volcanic gas plume), and are mostly dispersed west and south since the beginning of the day.
– No deformation is noticeable since the beginning of the eruption.
– The surface flows estimated from the satellite data, via the HOTVOLC platform (OPGC – University of Auvergne), remain between 2.5 and 5 m3 / s.
– The flow front is always in the upper part of the enclosure. The flow continues its progression towards the east by not getting closer progressively of the southern rampart of the Enclos  Fouqué.

Source : OVPF

Videos  : Facebook : B Films / Banor Jérôme , La Réunion vue du ciel / Alexandre Haffner.

Photo : OVPF

 

Aleutians Islands, Semisopochnoi:

AVO/USGS Volcanic Activity Notice
Current Volcano Alert Level: ADVISORY
Previous Volcano Alert Level: UNASSIGNED
Current Aviation Color Code: YELLOW
Previous Aviation Color Code: UNASSIGNED
Issued: Sunday, September 16, 2018, 9:56 AM AKDT
Source: Alaska Volcano Observatory
Notice Number:
Location: N 51 deg 55 min E 179 deg 35 min
Elevation: 2625 ft (800 m)
Area: Aleutians

Volcanic Activity Summary:
An increase in seismicity beginning 16:31 UTC (08:31 AKDT) on has prompted AVO to raise the Aviation Color Code and Volcano Alert Level to YELLOW/ADVISORY.
There is no clear indication from satellite imagery or regional infrasound data that Semisopochnoi is erupting at this time. AVO will continue to monitor Semisopochnoi seismic data and evaluate satellite images.

Recent Observations:
[Volcanic cloud height] Unknown
[Other volcanic cloud information] Unknown

Semisopochnoi, the largest subaerial volcano of the western Aleutians, is 20 km wide at sea level and contains an 8-km-wide caldera. It formed as a result of collapse of a low-angle, dominantly basaltic volcano following the eruption of a large volume of dacitic pumice. The high point of the island is 1221-m-high Anvil Peak, a double-peaked late-Pleistocene cone that forms much of the island’s northern part. The three-peaked 774-m-high Mount Cerberus volcano was constructed during the Holocene within the caldera. Each of the peaks contains a summit crater; lava flows on the northern flank of Cerberus appear younger than those on the southern side. Other post-caldera volcanoes include the symmetrical 855-m-high Sugarloaf Peak SSE of the caldera and Lakeshore Cone, a small cinder cone at the edge of Fenner Lake in the NE part of the caldera. Most documented historical eruptions have originated from Cerberus, although Coats (1950) considered that both Sugarloaf and Lakeshore Cone within the caldera could have been active during historical time.

This volcano is located within the Aleutian Islands, a UNESCO Biosphere Reserve property.

AVO/USGS Volcanic Activity Notice

Current Volcano Alert Level: WATCH
Previous Volcano Alert Level: ADVISORY

Current Aviation Color Code: ORANGE
Previous Aviation Color Code: YELLOW

Issued: Monday, September 17, 2018, 1:33 PM AKDT
Source: Alaska Volcano Observatory
Notice Number:
Location: N 51 deg 55 min E 179 deg 35 min
Elevation: 2625 ft (800 m)
Area: Aleutians

Volcanic Activity Summary:
Elevated seismicity that started yesterday has intensified over the past couple of hours, and a strong tremor signal at 20:49 UTC (12:49 AKDT) suggests that ash emissions may be occurring or are imminent at Semisopochnoi. Thus we are raising the Aviation Color Code to ORANGE and the Volcano Alert Level to WATCH.

Nothing has been detected in satellite, lightning, or infrasound data.

Close-view of the three summits of Mount Cerberus, a large, young, post-caldera vent cluster that dominates the interior of the caldera basin. Semisopochnoi Island, in November 2012. Photograph courtesy of Roger Clifford.

 

Recent Observations:
[Volcanic cloud height] Unknown
[Other volcanic cloud information] Unknown

Remarks:
Semisopochnoi is monitored with an on-island seismic network, and remotely by satellite and lightning sensors. An infrasound array on Adak Island could detect explosive emissions from Semisopochnoi with a 13 minute delay if atmospheric conditions permit.

Retrospective analysis of satellite data from September 10 shows evidence of a small ash deposit on the flanks of the north cone of Mount Cerberus, which may have resulted from two minor seismic tremor bursts recorded on September 8. This satellite imagery, combined with a further increase in seismic tremor amplitudes today, prompted AVO to raise the Aviation Color Code and Volcano Alert Level to ORANGE/WATCH. While the recent ash deposit suggests the potential for ash emissions coincident with elevated seismicity, there have been no ash emissions observed in cloudy satellite images around the time of today’s tremor increase. Furthermore, there has been no eruptive activity recorded on regional pressure sensors in Adak, although current atmospheric conditions limit signal propagation between Semisopochnoi and Adak.

Source : AVO

Photo : Clifford, Roger , Novembre 2012

 

Peru , Sabancaya :

An average of 13 EXP / day was recorded. Earthquakes associated with the rise of magma (hybrid types) remain very few and low energy. 
The columns of gas and eruptive ash reached a maximum height of 2500 m above the crater. The dispersion of these materials occurred within a radius of approximately 30 km, mainly in the North, Northeast and Southeast directions. 

The volcanic gas (SO2) flow recorded on September 12 a maximum value of 2060 tons / day, considered as a significant value. 
The deformation of the surface of the volcanic building presented deflationary variations in the vertical component. 
The MIROVA satellite system recorded 7 thermal anomalies, with values between 1 MW and 17 MW VRP (Radiated Volcano Power).

In general, eruptive activity maintains moderate levels. No significant changes are expected in the following days.

Source : IGP

 

Japan , Azumayama :

The meteorological agency has raised the alert level of eruption level 1 to level 2 (regulation around the crater) at 13:00 today on the Azumayama, and indicated that there was the possibility of a small-scale eruption. At the same time, Fukushima Prefecture, Fukushima City and Inawashiro-machi City have decided to close all the lines of the Bandai Azuma Skyline, to close each Jodohei facility and to close all the roads for the time being. surrounding mountaineering.

On Azumayama, an earthquake occurred around 9:13 am today (Sept. 15). The maximum amplitude was 6.7 micro m / s at the eastern observation point of Azuma Fuji (about 2 km east-southeast of the crater) and lasted about 4 minutes and 40 seconds. In addition, on the inclinometer installed at the observation point of the Jodo Plain (about 1 km east-southeast of the crater), the fluctuation of the slope continues to increase in the west direction (direction of the crater). ). It is possible that a small eruption will occur in the future.

The animation of Azumayama is dated September 15th around noon.

Source : Yasuhiro Kikuchi / Shérine France.

 

Kuril Islands , Sarychev Peak:

VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA) .

Issued: September 17 , 2018 
Volcano:Sarychev Peak (CAVW #290240)
Current aviation colour code:ORANGE
Previous aviation colour code:orange
Source:KVERT
Notice Number:2018-91
Volcano Location:N 48 deg 5 min E 153 deg 12 min
Area:Central Kuriles, Russia
Summit Elevation:4906.88 ft (1496 m)

Volcanic Activity Summary:
An eruptive activity of the volcano continues. According to visual data from Matua Island, explosions sent ash up to 4.5 km a.s.l. at 22:10 UTC on 17 September. Satellite data by KVERT showed an ash cloud 6×8 km in size drift to the east from the volcano.
An eruptive activity of the volcano continues. Ash explosions up to 32,800-49,200 ft (10-15 km) a.s.l. could occur at any time. Ongoing activity could affect international and low-flying aircrafts.

Volcanic cloud height:
14760 ft (4500 m) AMSL Time and method of ash plume/cloud height determination: 20180917/2210Z – Visual data
Other volcanic cloud information:
Distance of ash plume/cloud of the volcano: 13 mi (21 km)
Direction of drift of ash plume/cloud of the volcano: E / azimuth 92 deg
Time and method of ash plume/cloud determination: 20180917/2230Z – Himawari-8

Source : Kvert

Photo : V. Gurianov

September 14 , 2018. EN. Kuril Islands : Sarychev Peak , Japan : Ioto / Iwo – Jima , Chile , Nevados de Chillan , Italy / Sicily : Etna .

September 14 , 2018.

 

 

Kuril Islands  , Sarychev Peak :

VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA).

Issued: September 12 , 2018 .
Volcano: Sarychev Peak (CAVW #290240)
Current aviation colour code: YELLOW
Previous aviation colour code:green
Source:KVERT
Notice Number:2018-83
Volcano Location:N 48 deg 5 min E 153 deg 12 min
Area:Central Kuriles, Russia
Summit Elevation:4906.88 ft (1496 m)

Volcanic Activity Summary:
Activity of the volcano Sarychev Peak increased. According to visual data from Matua Island, explosions sent ash up to 3-4 km a.s.l. at 19:03 UTC on 12 September. An ash cloud drifted to the south-east from the volcano. At 21:00 UTC an ash cloud 5.5×6 km in size moved for about 121 km to the south-east from the volcano. Later the ash cloud was not observed.

Activity of the volcano increased. Strong ash explosions could occur at any time.

Volcanic cloud height:
9840-13120 ft (3000-4000 m) AMSL Time and method of ash plume/cloud height determination: 20180912/1903Z – Visual data
Other volcanic cloud information:
Distance of ash plume/cloud of the volcano: 75 mi (121 km)
Direction of drift of ash plume/cloud of the volcano: SE / azimuth 127 deg
Time and method of ash plume/cloud determination: 20180912/2100Z – Himawari-8

A state of Peak Sarychev volcano after a strong eruption on June 12-15, 2009: pyroclastic deposits covered all volcanic flanks.

Remarks:
A thermal anomaly over the volcano is noting sometimes from 07 May, 2018. Last moderate ash explosion of the volcano Sarychev Peak occurred on 11 August 2018.

Sarychev Peak, one of the most active volcanoes of the Kuril Islands, occupies the NW end of Matua Island in the central Kuriles. The andesitic central cone was constructed within a 3-3.5-km-wide caldera, whose rim is exposed only on the SW side. A dramatic 250-m-wide, very steep-walled crater with a jagged rim caps the volcano. The substantially higher SE rim forms the 1496 m high point of the island. Fresh-looking lava flows, prior to activity in 2009, had descended in all directions, often forming capes along the coast. Much of the lower-angle outer flanks of the volcano are overlain by pyroclastic-flow deposits. Eruptions have been recorded since the 1760s and include both quiet lava effusion and violent explosions. Large eruptions in 1946 and 2009 produced pyroclastic flows that reached the sea.

Source : Kvert , GVP.

Photo : A. Rybin, IMGG FEB RAS ( 7/2009 )

 

Japan , Ioto / Iwo – Jima :

Undersea eruption detected at Japan’s Iwo Jima.

Signs of undersea volcanic eruptions were detected at Iwo Jima, the site of one of the bloodiest battles in World War II, meteorological and defense officials said Wednesday.
Aerial photos taken by navy aircraft earlier Wednesday showed seawater shooting as high as 10 meters (33 feet) above the surface just off the island’s southern coast, the Japan Meteorological Agency said.


The island, which has been renamed Ioto, has been showing increased volcanic activity since the weekend, the agency said, warning of more eruptions. The island is 1,250 kilometers (780 miles) south of Tokyo.
Ioto last had an undersea explosion off its northern coast in 2013, and small overland explosions at few places in 2015, the agency said.
Defense officials said troops stationed on the island are safe and there are no evacuation plans. The island is closed to civilians, except for those with permits to search for the remains of more than 10,000 soldiers still unaccounted for or to attend memorial services and other special events.
 

Comment of volcanic activity on Iwo Jima
Meteorological Center of the Department of Volcanoes and Earthquakes

According to the Iwo Jima air base of the Maritime Self-Defense Force, this morning’s aerial observation confirmed that the seawater was 5 to 10 m above sea level on the south side. Iwo Jima. It is estimated that an eruption on the seabed has occurred. Volcanic earthquakes continue, the earthquake that occurred around 8 pm on the 11th continues and volcanic activity continues to be important.

On Iwo Jima, volcanic earthquakes have increased since 2 September, at about 0200 hours, and seismic activity gradually declined with peaks on 8 September, but many volcanic earthquakes continued to occur. The volcanic tremor continued around 8 pm on September 11th. In continuous observation, a large uplift was observed from the same period as the seismic activity and it continues to occur. Volcanic activity is still active. Since it is possible that an eruption will occur in the future, please remain alert to the eruption in the area of the coast.

Source : abcnews.go.com , data.jma.go.jp.

 

Chile , Nevados de Chillan :

The National Geological and Mining Service (SERNAGEOMIN), responsible for the National Volcanic Monitoring Network Chile (RNVV) and the Volcanological Observatory of the Southern Andes (OVDAS), said Wednesday, September 12, that an explosion took place in inside a crater of the volcanic complex Nevados de Chillán.

According to the special report of volcanic activity (REAV), the monitoring stations recorded an explosion associated with the partial destruction of the dome by pressurization of the volcanic system, the massif located in the Región de Ñuble.

In this regard, the national director of SERNAGEOMIN, Mario Pereira, said that the Nevados de Chillán remained in orange technical alert and that the episode occurred of a lower energy intensity than that of mid-July. « The height of the column of pyroclastic material is estimated at about 700 meters and the material fell around the crater in an estimated radius of 400 meters northeast to the Gato River.

Pereira added that surveillance is maintained on Nevados de Chillán, where more than 24 surveillance teams are spread over 11 stations. « Our specialists have the appropriate technologies to monitor volcanic activity and we deliver them to other institutions in a timely manner so that they have technical information on what is happening, including the map of areas of potential impact. « , did he declare.

Main Features
Nevados de Chillán remains on orange alert since April 5, 2018 and in July, three explosions destroyed part of the dome.
The volcanic complex has an elliptical shape, with a rock composition varying between dacitic and andesitic. It is located in the Andean mountain range of the Ñuble region, on the border of the communes of Coihueco and Pinto.

Since December 31, 2015, when the yellow alert was raised, the massif showed instability in its internal dynamics, which indicates a condition outside of its base level. Parameters derived from seismicity and observed surface activity, namely pulsatile minor explosions, thermal anomalies and degassing, continue.

Special Report on Volcanic Activity (REAV)
Del Nuble Region, Nevados Volcano of Chillan, September 13, 2018, 22:50 local time (mainland Chile)

The National Geological and Mining Service of Chile (Sernageomin) publishes the following PRELIMINARY information, obtained from monitoring equipment of the National Volcanic Monitoring Network (NVRN), processed and analyzed at the Volcanological Observatory of the Southern Andes (OVDAS) :

On Thursday, September 13th, 2018 at 22:18 local time (01:18 UTC), the monitoring stations installed near the Nevados volcano of Chillan recorded an earthquake associated with an explosion inside the active crater.

The characteristics of the earthquake after its analysis are as follows:
TIME OF ORIGIN: 22h18 Local time (01h18 UTC)
LATITUDE: 36,867 ° S
LONGITUDE: 71.372 ° W
DEPTH: 1.3 KM
REDUCED DISPLACEMENT: 955 cm2

OBSERVATIONS:
The earthquake associated with the explosion was recorded with a seismic signal having a significantly reduced displacement value (seismic energy). In addition to the IP camera installed by the OVDAS, it was possible to observe a strong incandescence, gases, and important hot particulate material falling on the surroundings of the active crater and the surrounding areas, especially towards North and North-East. . This episode allows to deduce by its characteristics the partial destruction of the dome.

At the time of the broadcast, no other abnormal signals were recorded

The level of volcanic technical alert remains at the level: ORANGE.
Sernageomin continues online monitoring and will inform in a timely manner about any changes observed.

Source : Sernageomin .

Photos : Agence UNO , TD Malargues , ADN Radio .

 

Italy / Sicily , Etna :

Etna: The explosions continue, a loud roar shortly after 10 am on September 13th.

The moderate eruption of the Sicilian volcano continues, characterized above all by explosions of ash and gas from the summit, which follow each other at irregular intervals.
This morning, there have already been several explosions, one particularly intense and noisy, around 10:05 am from the Southeast crater. The roar was clearly felt in the volcano area and in the villages on the slopes of Mount Etna.

The explosion caused the release of ash and smoke, clearly visible thanks to the weather conditions.

Source : inmeteo.net.

Photo : Benito Morabito

 

14 Septembre 218. FR . Iles Kouriles : Sarychev Peak , Japon : Ioto / Iwo-Jima , Chili : Nevados de Chillan , Italie / Sicile : Etna .

14 Septembre 2018.

 

 

Iles Kouriles : Sarychev Peak

AVIS D’OBSERVATION DU VOLCAN POUR L’AVIATION (VONA).

Publié: 12 Septembre 2018 .
Volcan: Sarychev Peak (CAVW # 290240)
Code couleur actuel de l’aviation: JAUNE
Code couleur de l’aviation précédente: vert
Source: KVERT
Numéro de l’avis: 2018-83
Emplacement du volcan: N 48 deg 5 min E 153 deg 12 min
Région: Central Kouriles, Russie
Altitude du sommet: 4906.88 pi (1496 m)

Résumé de l’activité volcanique:
L’activité du volcan Sarychev Peak a augmenté. Selon les données visuelles de l’île de Matua, les explosions ont émis des cendres qui se sont élevées jusqu’à 3 /4 km à 19h03 UTC le 12 septembre. Un nuage de cendres a dérivé au Sud-Est du volcan. À 21h00 UTC, un nuage de cendres de 5,5 x 6 km a parcouru environ 121 km vers le Sud-Est du volcan. Plus tard, le nuage de cendres n’a pas été observé.

L’activité du volcan a augmenté. De fortes explosions de cendres pourraient se produire à tout moment.

Hauteur des nuages ​​volcaniques:
9840-13120 ft (3000-4000 m) AMSL Temps et méthode de détermination du panache de cendres / hauteur de nuage: 20180912 / 1903Z – Données visuelles
Autres informations sur les nuages ​​volcaniques:
Distance du panache de cendres / nuage du volcan: 75 mi (121 km)
Direction de la dérive du panache de cendres / nuage du volcan: SE / azimut 127 deg
Temps et méthode de détermination du panache de cendres / nuages: 20180912 / 2100Z – Himawari-8

Un état du volcan Sarychev Peak après une forte éruption du 12 au 15 juin 2009: des dépôts pyroclastiques ont recouvert tous les flancs volcaniques.

Remarques:
Une anomalie thermique au-dessus du volcan est parfois constatée à partir du 7 mai 2018. La dernière explosion de cendres modérées du volcan Sarychev a eu lieu le 11 août 2018.

Le Sarychev Peak, l’un des volcans les plus actifs des îles Kouriles, occupe l’extrémité Nord-Ouest de l’île Matua dans le centre des Kouriles. Le cône central andésitique a été construit dans une caldeira de 3 à 3,5 km de large, dont le bord est exposé uniquement du côté Sud-Ouest. Un spectaculaire cratère de 250 mètres de large et des parois très escarpées avec un bord irrégulier chapeautent le volcan. Le rebord Sud – Est , sensiblement plus haut, forme le point culminant de l’île à 1496 m. Des coulées de lave fraîches, avant l’activité de 2009, étaient descendues dans toutes les directions, formant souvent des caps le long de la côte. Une grande partie des flancs extérieurs à faible angle du volcan sont recouverts de dépôts d’ écoulement pyroclastique. Des éruptions ont été enregistrées depuis les années 1760 et comprennent à la fois des coulées de lave silencieuses et des explosions violentes. Les grandes éruptions en 1946 et 2009 ont produit des écoulements pyroclastiques qui ont atteint la mer.

Source : Kvert , GVP.

Photo : A. Rybin, IMGG FEB RAS ( 7/2009 )

 

Japon , Ioto / Iwo – Jima :

Eruption sous-marine détectée sur Iwo Jima.

Des signes d’éruptions volcaniques sous-marines ont été détectés sur Iwo Jima, ont indiqué mercredi des responsables de la météorologie et de la défense.

L’agence météorologique japonaise a indiqué que des photos aériennes prises par des avions de la marine mercredi avaient montré que des vagues d’eau de mer avait atteint 10 mètres , sur la côte Sud de l’île.


L’île, qui a été rebaptisée Ioto, montre une activité volcanique accrue depuis le week-end, a indiqué l’agence, prévenant de nouvelles éruptions. L’île est à 1 250 kilomètres au Sud de Tokyo.
Ioto a connu en 2013 une explosion sous-marine au large de sa côte Nord et de petites explosions sur terre en 2015, a indiqué l’agence.
Les responsables de la défense ont déclaré que les troupes stationnées sur l’île sont en sécurité et qu’il n’y a pas de plans d’évacuation. L’île est fermée aux civils, à l’exception des personnes autorisées à rechercher les restes de plus de 10 000 soldats encore portés disparus ou à assister à des services commémoratifs et à d’autres événements spéciaux.
  
Commentaire d’activité volcanique sur Iwo Jima
Centre de météorologie du Département des Volcans et des Tremblements de terre

Selon la base aérienne d’Iwo Jima de la Force d’autodéfense maritime, l’observation par avion de ce matin a confirmé que l’eau de mer jaillissait de 5 à 10 m au-dessus du niveau de la mer du côté Sud d’Iwo Jima.  On estime qu’une éruption sur les fonds marins s’est produite. Les séismes volcaniques continuent , le tremblement de terre qui s’est produit vers 20 heures le 11 se poursuit et l’activité volcanique continue d’être importante.  

Sur Iwo Jima, les séismes volcaniques ont augmenté depuis le 2 septembre, vers 02 heures, et l’activité sismique a progressivement diminué avec des pics le 8 septembre , mais de nombreux séismes volcaniques continuaient de se produire. La secousse volcanique se poursuivait vers 20 heures le 11 septembre.  En observation continue, un grand soulèvement a été observé à partir de la même période que l’activité sismique et il continue de se produire. L’activité volcanique est toujours active. Puisqu’il est possible qu’une éruption se produise dans le futur, veuillez rester vigilant sur l’éruption dans la zone de la côte  .

Source : abcnews.go.com , data.jma.go.jp.

 

 

Chili , Nevados de Chillan :

Le service national  de géologie  et des mines (SERNAGEOMIN), responsable du Réseau national de surveillance volcanique Chili (RNVV) et l’Observatoire volcanologique des Andes du Sud (OVDAS), a déclaré mercredi 12 Septembre, qu’une explosion a eu lieu à l’intérieur d’un cratère du complexe volcanique Nevados de Chillán.

Selon le rapport spécial d’activité volcanique ( REAV), les stations de surveillance ont enregistré une explosion associée à la destruction partielle du dôme par pressurisation du système volcanique , du massif situé dans la Región de Ñuble.


À cet égard, le directeur national du SERNAGEOMIN, Mario Pereira, a déclaré que le Nevados de Chillán restait en alerte technique orange et que l’épisode survenu était d’une intensité énergétique inférieure à celui de la mi-juillet. « La hauteur de la colonne de matériau pyroclastique est estimée à environ 700 mètres et le matériau est retombé autour du cratère dans un rayon estimé à 400 mètres au Nord-Est, jusqu’au fleuve Gato.

Pereira a ajouté que la surveillance est maintenue sur le Nevados de Chillán, où plus de 24 équipes de surveillance sont réparties dans 11 stations. « Nos spécialistes disposent des technologies adéquates pour surveiller l’activité volcanique et nous les livrons à d’autres institutions en temps opportun afin qu’elles disposent d’informations techniques sur ce qui se passe, y compris la carte des zones d’impact potentiel », a-t-il déclaré.

Caractéristiques générales
Le Nevados de Chillán reste en alerte orange depuis le 5 avril 2018 et en juillet, trois explosions ont détruit une partie du dôme.
Le complexe volcanique a une forme elliptique, de composition rocheuse variant entre dacitique et andésitique. Il est situé dans la chaîne de montagnes andines de la région de Ñuble, à la frontière des communes de Coihueco et de Pinto.
Depuis le 31 décembre 2015, lorsque l’alerte jaune a été relevée, le massif a présenté une instabilité dans sa dynamique interne, ce qui indique une condition en dehors de son niveau de base. Les paramètres dérivés de la sismicité et de l’activité de surface observée, à savoir les explosions mineures pulsatiles, les anomalies thermiques et le dégazage, se poursuivent.

Rapport spécial sur l’activité volcanique (REAV)
Région Del Nuble , Volcan Nevados de Chillan ,13 Septembre 2018, 22h50 Heure locale (Chili continental)

Le Service national de géologie et des mines du Chili (Sernageomin) publie les informations PRELIMINAIRES suivantes, obtenues grâce au matériel de surveillance du Réseau national de surveillance volcanique (RNVV), traitées et analysées à l’Observatoire volcanologique des Andes du Sud (OVDAS):

Le Jeudi 13 Septembre 2018 à 22h18 Heure locale (01h18 UTC), les stations de surveillance installées à proximité du volcan Nevados de Chillan ont enregistré un séisme associé à une explosion   à l’intérieur du cratère actif .

Les caractéristiques du séisme après son analyse sont les suivantes:
TEMPS D’ ORIGINE : 22h18 Heure locale (01h18 UTC)
LATITUDE: 36,867° S
LONGITUDE : 71,372° O
PROFONDEUR: 1,3 KM
DEPLACEMENT REDUIT : 955 cm2

OBSERVATIONS:
Le séisme associé à l’ explosion a été enregistré avec un signal sismique ayant une valeur de déplacement réduit ( énergie sismique) considérablement haute . Depius la camera IP installée par l’OVDAS , il a été possible d’observer une forte incandescence , des gaz, et un important matériel particulaire chaud retombant sur les alentours du cratère actif et les secteurs proches , surtout en direction Nord et Nord-Est . Cet épisode permet de déduire par ses caractéristiques la destruction partielle du dome .

Au moment de l’émission, il n’a pas été enregistré d’autre signaux anormaux
Le niveau d’alerte technique volcanique reste au niveau : ORANGE .

Le Sernageomin poursuit la surveillance en ligne et informera de manière opportune sur les changements éventuels observés.

Source : Sernageomin .

Photos : Agence UNO , TD Malargues , ADN Radio .

 

Italie / Sicile , Etna :

Etna: les explosions continuent, un rugissement fort peu après 10 heures le 13 Septembre .

L’éruption modérée du volcan sicilien se poursuit, caractérisée avant tout par des explosions de cendres et de gaz provenant du sommet qui se succèdent à intervalles irréguliers.
Ce matin, il y a déjà eu plusieurs explosions, l’une particulièrement intense et bruyante, vers 10h05 depuis le cratère Sud-Est. Le rugissement a été clairement ressenti dans la région du volcan et dans les villages sur les pentes de l’Etna.

L’explosion a provoqué le dégagement de cendres et de fumée, clairement visibles grâce aux conditions météorologiques.

Source : inmeteo.net.

Photo : Benito Morabito