December 13 , 2017. EN. Agung , Cleveland , Nevado del Ruiz , Kanlaon , Fuego .

Home / agung / December 13 , 2017. EN. Agung , Cleveland , Nevado del Ruiz , Kanlaon , Fuego .

December 13 , 2017. EN. Agung , Cleveland , Nevado del Ruiz , Kanlaon , Fuego .

December 13 , 2017.

 

Agung , Indonesia :

On the basis of the results of the visual and instrumental data analysis and considering the potential threats of danger, on November 27, 2017 at 06:00, the status of G. Agung was raised from Level III (SIAGA) to Level IV (AWAS) . Since yesterday and until today visually the volcano is clearly visible until the appearance of the mist. Eruptions and puffs of gray ash – white, thick, of medium pressure, reach a height of about 500 to 2500 m above the summit and incline towards the West. At night, the glow of the incandescent lava in the crater of the volcano is observed.

Seismograph records on December 12, 2017 have noted:
7 shallow volcanic earthquakes (VB)
11 deep volcanic earthquakes (VA)
1 local tectonic earthquake.
1 earthquake of eruption.
22 Low Frequency events.
51 earthquakes of emission.
No harmonic tremor.
A continuous tremor with an amplitude of 1 to 2 mm and a dominant value of 1 mm.

As of December 13, 2017 (00:00 to 18:00) it has been registered:
10 emission earthquakes
No earthquakes of eruption.
4 low frequency earthquakes.
4 shallow volcanic earthquakes (VB)
1 deep volcanic earthquake (VA)
No local tectonic earthquakes.
No harmonic tremor.
A continuous tremor with an amplitude of 1 to 2 mm and a dominant value of 1 mm.

Recommendations:
Communities around G. Agung and mountaineers / visitors / tourists must not climb, climb or do any activity in the danger zone around the G. Agung crater area and in all areas within 8 km from the crater of G. Agung. With a sectoral extension to the North-East and South-East-South-South-West up to 10 km from the crater of G. Agung. The estimated area risks are dynamic and continuously assessed and can be modified at any time based on the most recent observational data from G. Agung.

VOLCANO OBSERVATORY NOTICE FOR AVIATION – VONA.

Issued: December 12 , 2017 
Volcano: Agung (264020)
Current Aviation Colour Code: ORANGE
Previous Aviation Colour Code: orange
Source: Agung Volcano Observatory
Notice Number: 2017AGU23
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 0955 UTC ( 1755 local). Eruption and ash emission is not continuing

Volcanic Cloud Height:
Best estimate of ash-cloud top is around 18054 FT (5642 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 low Frequency earthquakes.

Source : VSI , Magma .

 

Cleveland , Alaska :

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

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

Issued: Tuesday, December 12, 2017, 12:31 PM AKST
Source: Alaska Volcano Observatory
Notice Number:
Location: N 52 deg 49 min W 169 deg 56 min
Elevation: 5676 ft (1730 m)
Area: Aleutians

Volcanic Activity Summary: Recent satellite images of Cleveland Volcano show that lava effusion in the summit has likely ceased. Activity at Cleveland over the past several weeks has been characterized by small to very small explosions that have reduced the dome in the crater to rubble but have not produce detectable eruption clouds. Due to the low level of current activity, AVO is lowering the Aviation Color Code to YELLOW and the Volcano Alert Level to ADVISORY.

Recent Observations:
[Volcanic cloud height] Not applicable
[Other volcanic cloud information] Not applicable

Remarks: Cleveland volcano is not monitored with a full real-time seismic network and this inhibits AVO’s ability to detect unrest that may lead to future activity. We are able to detect explosive activity using infrasound and limited seismic instruments on the island.

Source : AVO

 

Nevado Del Ruiz , Colombia :

Subject: Bulletin of activity of the Nevado del Ruiz volcano.
The level of activity continues at the level: Yellow activity level or (III): changes in the behavior of volcanic activity.

With regard to monitoring the activity of the Nevado del Ruiz volcano, the COLOMBIAN GEOLOGICAL SERVICE informs that:

During the last week, the various monitoring parameters show that the Nevado del Ruiz volcano continues to display unstable behavior.
The seismicity caused by the fracturing of the rocks that make up the volcano has decreased in released seismic energy and in the number of earthquakes, compared to the previous week. The earthquakes were mainly in the Southwest, North-East, South and South-East areas of the volcano and, to a lesser extent, in the crater area, as well as in the north-distal sector, at about 7, 5 km from crater Arenas. The depths of the earthquakes varied between 1.3 and 6.8 km. There is a slight increase in this type of seismicity, on December 09 between 04:00 and 06:30 (local time), with a low level of energy, located about 6.5 km southwest of the crater. The maximum magnitude recorded during the week was 0.7 ML (Local Magnitude), corresponding to the earthquake recorded on December 11 at 4:13 am (local time), located 6.3 km southwest of the crater Arenas, at a depth of 3.7 km.

The seismic activity associated with fluid dynamics within the channels of the volcanic structure showed similar levels in the number of earthquakes recorded and a decrease in seismic energy released, compared to the previous week. This type of activity is characterized mainly by the occurrence of multiple earthquakes, long periods and very long periods, as well as tremor impulses.
The volcanic deformation measured from electronic inclinometers, GNSS (Global Navigation Satellite System) stations and radar images, show a stability behavior without recording significant deformation processes of the volcanic structure.

The volcano continues to emit water vapor and gases into the atmosphere, among which is the sulfur dioxide (SO2), as evidenced by the values obtained by the SCANDOAS stations installed on the volcano and the analysis satellite images. In the follow-up of the information provided by the MIROVA and NASA FIRMS portals, several thermal anomalies were recorded in the vicinity of the Arenas crater.
The column of gas and steam reached a maximum height of 1500 meters measured at the top of the volcano, December 10. The direction of the dispersion of the column was governed by the direction of the wind in the zone, which during the week prevailed to the southwest relative to the crater Arenas.

The Nevado del Ruiz volcano continues at the level of yellow activity.

Source : SGC

 

Kanlaon, Philippines :

KANLAON VOLCANO BULLETIN 13 December 2017 08:00 A.M.

Kanlaon Volcano’s seismic monitoring network recorded five hundred seventy eight (578) volcanic earthquakes during the past 24 hours. Moderate emission of white steam-laden plumes that rose to 800 meters before drifting northwest was observed. Ground deformation data from continuous GPS measurements indicate slight inflation of the edifice since December 2015. Sulfur dioxide (SO2) emission was measured at an average of 603 tonnes/day on 12 December 2017.


Alert Level 2 status prevails over Kanlaon Volcano, which means that the volcano is undergoing a moderate level of unrest. There is probable intrusion of magma at depth which may or may not lead to a magmatic eruption. The local government units and the public are strictly reminded that entry into the 4-kilometer radius Permanent Danger Zone (PDZ) is strictly prohibited due to the further possibilities of sudden and hazardous steam-driven or phreatic eruptions. Civil aviation authorities must also advise pilots to avoid flying close to the volcano’s summit as ejecta from any sudden phreatic eruption can be hazardous to aircraft. DOST-PHIVOLCS is closely monitoring Kanlaon Volcano’s activity and any new development will be relayed to all concerned.

Source : Phivolcs

 

Fuego , Guatemala :

The twelfth eruption of the Fuego volcano after 36 hours with intense activity ends according to the record of the seismic station FG3. So far there are still moderate explosions generating ash columns ranging from 4,700 to 4,900 meters (15,420 to 16,076 feet) and are displaced more than 20 kilometers southwest and south, which is expected to decrease in the coming hours. The lava flow towards the Seca canyon (Santa Teresa) has disappeared in its entirety.


Up to now, an average of 10 explosions per hour is generated, which generates moderate avalanches towards the channels of the Ceniza and Taniluyá canyons, as well as the fall of ash, mainly in nearby communities such as Panimaché I and II, Morelía, Santa Sofía, La Rochela and possibly others located in this zone .

Source : Insivumeh
Photo : David Rojas

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