June 21 , 2018. EN. Hawai : Pu’u ‘Ō’ō / Kilauea , Chile : Puyehue / Cordon Caulle , Indonésia : Ibu , Colombia , Chiles / Cerro Negro .

Home / blog georges Vitton / June 21 , 2018. EN. Hawai : Pu’u ‘Ō’ō / Kilauea , Chile : Puyehue / Cordon Caulle , Indonésia : Ibu , Colombia , Chiles / Cerro Negro .

June 21 , 2018. EN. Hawai : Pu’u ‘Ō’ō / Kilauea , Chile : Puyehue / Cordon Caulle , Indonésia : Ibu , Colombia , Chiles / Cerro Negro .

June 21 ,  2018.

 

 Pu’u ‘Ō’ō / Kilauea , Hawai :

Tuesday, June 19, 2018, 10:32 PM HST (Wednesday, June 20, 2018, 08:32 UTC)

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

Kīlauea Volcano Lower East Rift Zone

The eruption in the lower East Rift Zone (LERZ) continues with little change.

Fountains 165-246 ft high at Fissure 8 continue to feed the established channel that transports lava to the ocean at the Kapoho coastline, where several entries are active. Upslope, short-lived overflows occur periodically but generally do not travel beyond the existing flow field. Fissures 6, 15, and 16 are periodically oozing lava and steaming.

Unbelievable channelized river moving fast between the perched ponds. The river has been pulsing ever 10 min. It will move a regular speed of upwards of 20mph then it pulses with the inflow of more lava. Also when these rivers pulse it brings down these massive boulders tumbling down the channel and creating a lava rapid. It's just amazing how much volume fissure 8 is producing. Aloha everyone more video's and updates coming up soon. Aloha! Watch in HD #stayclassypuna #alohaforpuna

Publiée par Ikaika Marzo sur Mercredi 20 juin 2018

Pele’s hair and other lightweight volcanic glass fragments from the lava fountain at Fissure 8 continue to fall downwind of the fissure, dusting the ground within a few hundred meters (yards) of the vent. High winds may waft lighter particles to greater distances. Residents are urged to minimize exposure to these volcanic particles, which can cause skin and eye irritation similar to volcanic ash.

HVO field crews are on site tracking the fountains, lava flows, and spattering from Fissure 8 as conditions allow and are reporting information to Hawaii County Civil Defense. Observations are also collected on a daily basis from cracks in the area of Highway 130; no changes in temperature, crack width, or gas emissions have been noted for several days.

Volcanic gas emissions remain very high from Fissure 8 eruptions. Winds are expected to bring VOG to the central, south, and western parts of the Island of Hawaii.

Magma continues to be supplied to the Lower East Rift Zone. Seismicity remains relatively low in the area with numerous small magnitude earthquakes and low amplitude background tremor. Higher amplitude tremor is occasionally being recorded on seismic stations close to the ocean entry.

Kīlauea Volcano Summit

The 5:05 a.m. HST subsurface explosion at Kīlauea’s summit this morning was followed by 4 hours of low seismicity (<10 events/hour). Seismicity gradually increased thereafter reaching, 30-35 events per hour by 10:00 p.m. HST. If the pattern of the past several days holds, another subsurface explosion is likely within the next few hours. Inward slumping of the rim and walls of Halemaʻumaʻu continues in response to ongoing subsidence at the summit.
Sulfur dioxide emissions from the volcano’s summit have dropped to levels that are about half those measured prior to the onset of the current episode of eruptive activity. This gas and minor amounts of ash are being transported downwind, with small bursts of ash and gas accompanying intermittent explosive activity.

Wednesday, June 20, 2018, 9:02 AM HST (Wednesday, June 20, 2018, 19:02 UTC)

Kīlauea Volcano Lower East Rift Zone

The eruption in the lower East Rift Zone (LERZ) continues with little change.

Lava fountains from the Fissure 8 spatter cone continue to feed the established channel that transports lava to the ocean at the Kapoho coastline, where several entries are active. Upslope, short-lived overflows occur periodically but generally do not travel beyond the existing flow field. Fissures 6, 15, and 16 are periodically oozing lava and steaming.

Kīlauea Volcano Summit

At 4:22 AM HST, a gas and ash emission from a collapse event occurred at Kīlauea’s summit, producing a small plume that was blown downwind at less than 6,000 ft above sea level. Inward slumping of the rim and walls of Halemaʻumaʻu continues in response to ongoing subsidence at the summit.

Wednesday, June 20, 2018, 5:04 PM HST (Thursday, June 21, 2018, 03:04 UTC)

Kīlauea Volcano Lower East Rift Zone

The eruption in the lower East Rift Zone (LERZ) continues with little change.

Lava fountains from the Fissure 8 spatter cone continue to feed the established channel that transports lava to the ocean at the Kapoho coastline with one main entry area active at the south end of the flow front at the ocean. Upslope, short-lived overflows occur periodically but generally do not travel beyond the existing flow field. Fissures 6 and 16 appeared to be only fuming during our early afternoon overflight.

View of the southern edge of the growing Halema‘uma‘u crater (middle right) during yesterday’s helicopter-assisted work at Kīlauea’s summit. The once-popular parking lot (closed since 2008) that provided access to Halema‘uma‘u is no longer–the parking lot fell into the crater this past week as more and more of the Kīlauea Crater floor slides into Halema‘uma‘u. The Crater Rim Drive road (middle) now ends at Halema‘uma‘u instead of the parking lot. The view is toward the west-northwest.

 

Kīlauea Volcano Summit

Seismicity at the summit continues to increase after abruptly decreasing after this morning’s gas and ash emission. Inward slumping of the rim and walls of Halemaʻumaʻu continues in response to ongoing subsidence at the summit.

Source : HVO

Video : Ikaika Marzo

Photo : Andrew Hara , 

 

Puyehue / Cordon Caulle , Chile :  

The National Service of Geology and Mining (Sernageomin) publishes the following information, obtained thanks to the monitoring equipment of the National Network of Volcanic Surveillance treated and analyzed at the Volcanological Observatory of the South Andes, center of interpretation of the Sernageomin data:

On the basis of the analyzes dated 01 to 15 June, it is informed that a total of 272 seismic events have been recorded, of which 48 have been classified as long-period type (LP) earthquakes in relation to the dynamics of fluids inside the volcanic building. The higher energy event had reduced displacement values ​​(DRc) equal to 12.5 cm2. Also, there were recorded215 volcano-tectonic earthquakes (VT) associated with rock fracturing phenomena. The event of greatest energy had a local magnitude equal to M 2.3 and was located 0.6 km west of the emission center of 2011, at a depth of 2.9 km. Finally, 9 hybrid-type events (HB) were recorded characterized by a complex process (rock fracturing process and fluid dynamics within the volcanic edifice). The event of greatest energy had a local magnitude equal to M 2.3 and reduced displacement values ​​(DRc) equal to 300 cm2. It was located 5.2 km southeast of the emission center of 2011, at a depth of 1.7 km

The images provided by the IP cameras installed around the volcano did not show any superficial changes.
According to the geodetic data provided by 3 GNSS stations, the previously reported inflationary process is maintained. The maximum rates recorded for this period correspond to a maximum of 0.8 cm / month in the vertical component and 0.6 cm / month in the horizontal component.

In addition, the interferometry data made with radar images show a deflation in the area close to the lava emission point during the eruption of 2011, active to this day.

No emissions of sulfur dioxide (SO2) to the atmosphere in the volcano area have been reported, according to data published by the Ozone Monitoring Instrument (OMI) Sulfur Dioxide Group (http: / /so2.gsfc.nasa.gov/) and the National Environmental Satellite Information and Data Service (NESDIS) (http://satepsanoine.nesdis.noaa.gov).

No thermal warning was reported in the volcano-associated area throughout the period, according to data processed by infrared, a means of observing volcanic activity (Mirova) (http://www.mirovaweb.it/) and MODVOLC (http://modis.higp.hawaii.edu/).
Hybrid earthquake recordings of moderate magnitude, associated with signs of deformation in the volcanic building, are indicators of the development of processes that can lead to imbalance of the volcanic system, particularly due to the presence of a magmatic body relatively shallow (lacolite) dating from the 2011 eruption.

As a result, the volcanic alert level is changed to:
YELLOW alert level

Sernageomin is continuing its online monitoring and will report in a timely manner on possible changes in volcanic activity in the region.

Source : Sernageomin

 

Ibu , Indonesia :

VOLCANO OBSERVATORY NOTICE FOR AVIATION – VONA .

Issued: June 21 2018.
Volcano: Ibu (268030)
Current Aviation Colour Code: ORANGE
Previous Aviation Colour Code: orange
Source: Ibu Volcano Observatory
Notice Number: 2018IBU07
Volcano Location: N 01 deg 29 min 17 sec E 127 deg 37 min 48 sec
Area: North Maluku, Indonesia
Summit Elevation: 4240 FT (1325 M)

Volcanic Activity Summary:
Eruption with volcanic ash cloud at 2357 UTC (0857 local).

Volcanic Cloud Height:
Best estimate of ash-cloud top is around 6160 FT (1925 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 north.

Remarks:
Seismic activity is characterized by explosion and rock avalanches earthquakes.

Source : Magma Indonésia.

 

Chiles / Cerro Negro , Colombia :

Subject: Activity bulletin of Chiles and Cerro Negro volcanoes

The level of activity of volcanoes is maintained at the level:
YELLOW LEVEL ■ (III): CHANGES IN THE CONDUCT OF VOLCANIC ACTIVITY

Following the activity of VOLCANS CHILES and CERRO NEGRO, the COLOMBIAN GEOLOGICAL SERVICE (SGC) reports that:

For the period evaluated between June 12 and 18, 2018 and compared with previous periods, seismicity in the region of Chiles – Cerro Noire volcanoes, showed an increase from 1528 to 1802 events. Most of these earthquakes are associated with rock fracturing inside the volcanic building. These events were located south and southwest of the summit of the Chiles volcano at epicentral distances between 0.5 and 9 km, with depths less than 9 km from the summit (4700 m) and M2 on the Richter scale.

The Colombian Geological Survey and the National Institute of Geophysics of the Ecuador Polytechnic University are closely monitoring the evolution of this seismic and volcanic activity and will report immediately on the changes detected.

Source : SGC

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