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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
Merapi - Avalanche pyroclastic flow on 02.02.2022 / 4 p.m. - PVMBG

Merapi - Avalanche pyroclastic flow on 02.02.2022 / 4 p.m. - PVMBG

Pyroclastic avalanche flows were recorded at Merapi on February 2, 2022 at 3:58 p.m. WIB; the trace on the seismogram has an amplitude of 13 mm and a duration of 129 seconds. The glide distance is 2,000 m towards the Bebeng River (southwest).

Merapi - seismicity on 02.02.2022 - Doc. BPPTKG

Merapi - seismicity on 02.02.2022 - Doc. BPPTKG

The BPPTKG reports more than 140 avalanche earthquakes, 137 hybrid earthquakes, 8 blast / emission earthquakes, 25 volcanic earthquakes, 4 tectonic earthquakes.

The Merapi remains in activity level 3 / siaga since November 5, 2020

 

Source: BPPTKG, PVMBG, Magma Indonesia

Lascar - image Sentinel-2 bands 12,11,8A from 02.02.2022 / 2:37 p.m. - via Mounts Project

Lascar - image Sentinel-2 bands 12,11,8A from 02.02.2022 / 2:37 p.m. - via Mounts Project

SERNAGEOMIN reported minor increases in surface activity at Láscar.

The nocturnal incandescence of the crater began to be visible at least since January 11. A total of 14 thermal anomalies were identified in satellite data from January 13-28; anomaly intensity increased on January 17 and peaked on January 22.

Lascar - thermal anomalies on 02.02.2022 / 2:49 p.m. - Sentinel-2 bands 12,11,8A & Modis thermal volcanic activity - Doc.Mirova

Lascar - thermal anomalies on 02.02.2022 / 2:49 p.m. - Sentinel-2 bands 12,11,8A & Modis thermal volcanic activity - Doc.Mirova

Gas and steam emissions were more frequent and robust compared to previous months, with the highest plume rising more than 1 km above the crater rim on January 22. Sulfur dioxide emissions were identified in satellite data on January 8 and 17; instruments at the EMU station, 6 km ESE, recorded increased emission rates from 17 to 19 January with an average peak of 1,787 tonnes per day on 18 January.

Seismicity was at normal levels throughout January 12-28. Low numbers and magnitudes of volcano-tectonic (VT) and long-period (LP) earthquakes were recorded by the seismic network, although 27 low-magnitude (M 1 or less) VT events were recorded on January 22 . Satellite images acquired on January 26 showed no recent morphological changes at the crater or deposits around the crater area.

The alert level remained at green (the lowest level on a four-color scale).

 

Sources: Sernageomin & Global Volcanism program

Galapagos / Wolf - thermal anomalies as of 02.02.2022 / 7:50 p.m. - Doc. Mirova _MODIS_Latest10NTI

Galapagos / Wolf - thermal anomalies as of 02.02.2022 / 7:50 p.m. - Doc. Mirova _MODIS_Latest10NTI

MIROVA recorded 3 very high thermal anomalies (6005 MW, 3392 MW and 1532 MW) and 1 moderate, while FIRMS recorded more than a hundred thermal anomalies at Wolf Volcano, on Isabela Island in the Galapagos, during of the last 24 hours.These anomalies are related to lava flows to the south.


Long period (LP) earthquake :  1
Alert level - SNGRE: Orange

 

Sources: IGEPN & Mirova

Myrdalsjokull - Katla - photo RUV 29.07.2021

Myrdalsjokull - Katla - photo RUV 29.07.2021

At 19:10 UTC on February 02, 2022, a strong earthquake swarm started at Katla volcano, below Myrdalsjökull in Iceland. The strongest earthquakes to date had a magnitude of Mw4.0 (19:10 UTC) and Mw3.4 (19:44 UTC).

To monitor.

 

Source: Icelandic Met Office

Myrdalsjökull - Katla - seismicity on 03.02.2022 / 07:10 - Doc. IMO
Myrdalsjökull - Katla - seismicity on 03.02.2022 / 07:10 - Doc. IMO
Myrdalsjökull - Katla - seismicity on 03.02.2022 / 07:10 - Doc. IMO

Myrdalsjökull - Katla - seismicity on 03.02.2022 / 07:10 - Doc. IMO

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