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Earth of fire

Actualité volcanique, Articles de fond sur étude de volcan, tectonique, récits et photos de voyage

Publié le par Bernard Duyck
Publié dans : #volcanic activity

At Santiaguito, seismic stations and observer reports record prolonged periods of degassing, forming a 400-meter column above the dome of Caliente Dome that moves west and southwest.

Weak avalanches affect the southwest and west flanks. This causes fine ash particles to fall into the volcanic perimeter and disperse several kilometers to the south and southwest.
Due to the permanent extrusion of boulder lava in the dome of the Caliente dome, in a west-southwest direction, the occurrence of stronger boulder and ash avalanches is not excluded, as well as possible long-range pyroclastic flows in different directions.

The 2 lava flows to the west and southwest of the crater reached lengths of 600 and 800 meters on February 27. Ash falls are reported in the villages of San Marcos and Loma Linda Palajunoj.

It is recommended not to stay near or in the neighboring canyons of the volcano.

 

Source: Insivumeh 28.02.2022

Santiaguito - Landsat-8 SWIR image from 27.02.2022 - doc. via Insivumeh

Santiaguito - Landsat-8 SWIR image from 27.02.2022 - doc. via Insivumeh

In the Galapagos, the activity of the Wolf volcano continues.

FIRMS registers 229 thermal alerts and MIROVA registers 2 high thermal alerts (181 and 974 MW) and 1 very high (2012 MW) in the last 24 hours
These thermal anomalies on the satellite are due to advancing lava.

Only one volcano-tectonic earthquake is reported in the last 24 hours.

 

Source: IGEPN 28.02.2022

Wolf - image Sentinel-2 bands 12,11,4 dated 02.28.2022 - one click to enlarge

Wolf - image Sentinel-2 bands 12,11,4 dated 02.28.2022 - one click to enlarge

Wolf - thermal anomalies as of 02.28.2022 / 3:45 p.m. - Doc. Mirova_MODIS_logVRP

Wolf - thermal anomalies as of 02.28.2022 / 3:45 p.m. - Doc. Mirova_MODIS_logVRP

Mount Semeru experienced an eruptive episode on Monday February 28, 2022 at 3:48 p.m. WIB.

No visual rash was observed. This eruption was recorded on a seismograph with a maximum amplitude of 22 mm and a duration of 1080 seconds.

Semeru - seismogram of 02.28.2022 4:17 p.m. WIB - Doc. Magma Indonesia

Semeru - seismogram of 02.28.2022 4:17 p.m. WIB - Doc. Magma Indonesia

The seismicity of February 28 is characterized by:

38 eruption earthquakes, with an amplitude of 10-22 mm and an earthquake duration of 50-115 seconds.
1 avalanche pyroclastic flow earthquake, with an amplitude of 22 mm and an earthquake duration of 1620 seconds.
1 temporal avalanche earthquake
18 blast/emission earthquakes, with an amplitude of 2 to 10 mm and an earthquake duration of 25 to 100 seconds.
1 episode of Harmonic tremor with an amplitude of 9 mm, and an earthquake duration of 385 seconds.
3 deep volcanic earthquakes
2 distant tectonic earthquakes

The level of activity remains at 3 / siaga, with the recommendations of the PVMBG:
1. Do not carry out any activity in the southeastern sector along Besuk Kobokan, up to 13 km from the summit (the center of the eruption). Beyond this distance, the community does not conduct activities within 500 meters of the bank (river edge) along Besuk Kobokan due to the potential for expansion of hot clouds and lava flows. lava up to a distance of 17 km from the summit.
2. Do not travel within 5 km of the crater/summit of Mount Semeru as it is subject to the danger of rock throwing (incandescent).
3. Be aware of the potential for pyroclastic avalanche flows (APG), lava avalanches and lahars along the rivers/valleys that originate at the summit of Mount Semeru, especially along Besuk Kobokan, Besuk Bang, Besuk Kembar and Besuk Sat as well as potential lahars in the rivers a small river which is a tributary of Besuk Kobokan.

 

Source: PVMBG, Magma Indonesia

Telica - ash and gas emissions on 20, 22 and 23.02.2022 - INETER webcam - one click to enlarge
Telica - ash and gas emissions on 20, 22 and 23.02.2022 - INETER webcam - one click to enlargeTelica - ash and gas emissions on 20, 22 and 23.02.2022 - INETER webcam - one click to enlarge

Telica - ash and gas emissions on 20, 22 and 23.02.2022 - INETER webcam - one click to enlarge

The Telica volcano, located in the department of León / Nicaragua, continues to record low intensity exhalations and explosions with ash emanation; moderate thermal anomalies were reported by Mirova.

This activity will continue in the hours and days to come, the Nicaraguan Institute for Territorial Studies reported on Monday.

 

Source: INETER.

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