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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

The eruptive activity of Fuego, Guatemala, on the rise since September 3, experiences Strombolian activity on September 22, which feeds two lava flows of respectively 350 and 250 meters in length in the barrancas Ceniza and Trinidad. They produce avalanches of incandescent blocks that move up to the vegetation line in these drainages, as well as in the Santa Teresa barranca.

Fuego - 09.22.2021 - Strombolian activity and falling glowing blocks / Gustavo Chigna via Sky alert

Fuego - 09.22.2021 - Strombolian activity and falling glowing blocks / Gustavo Chigna via Sky alert

Fuego - RSAM of September 22, 2021 - Doc. Insivumeh - one click to enlarge

Fuego - RSAM of September 22, 2021 - Doc. Insivumeh - one click to enlarge

This activity produced this September 23 at 5:40 am a pyroclastic flow in the barranca Ceniza. It moved 4 to 6 kilometers, reaching the base of the volcano.

At 7:35 am local time, other pyroclastic flows, smaller, were reported by Insivumeh in barancas Ceniza and Trinidad, moving for 2 to 4 km. They were accompanied by a cloud of ash which partially covered the side of the volcano, and caused ash falls on the communities located to the west and southwest of the Fuego.

Fuego - 23.09.2021 / 11:45 - eruption and pyroclastic flow - photo Insivumeh special bulletin

Fuego - 23.09.2021 / 11:45 - eruption and pyroclastic flow - photo Insivumeh special bulletin

Fuego - 23.09.2021 / 13:36 - eruption and pyroclastic flow - photo Insivumeh special bulletin

Fuego - 23.09.2021 / 13:36 - eruption and pyroclastic flow - photo Insivumeh special bulletin

Fuego - pyroclastic flow of 23.09.2021 seen from El Rodeo y La Reina, Escuintla - photo COLRED

Fuego - pyroclastic flow of 23.09.2021 seen from El Rodeo y La Reina, Escuintla - photo COLRED

Fuego - RSAM from 22.09 to 23.09.2021 / 17:38 - Doc. Insivumeh - one click to enlarge

Fuego - RSAM from 22.09 to 23.09.2021 / 17:38 - Doc. Insivumeh - one click to enlarge

Strombolian activity remains at this level, with constant locomotive sounds of moderate to strong shock waves. Flows are generated in the direction of the barrancas Ceniza and Seca, and reach a length of 1,200 and 1,000 meters respectively. They generate moderate pyroclastic flows in the barrancas Trinidad and Ceniza at 10:50, 11:25 and 11:33; ash falls are reported on the western and southern flanks.

Activity has been on the rise since 11 a.m.

The eruptive plumes are maintained at 6,000 m. asl., then moving west and southwest for 15 and 30 km.

 

Sources: Insivumeh, Conred, Mirova

Fuego - 23.09.2021 - the eruption was visible from the Capital - photo Insivumeh

Fuego - 23.09.2021 - the eruption was visible from the Capital - photo Insivumeh

Fuego - thermal anomalies at 09.24.2021 / 04:05 am - Doc. Mirova_MODIS_VRP

Fuego - thermal anomalies at 09.24.2021 / 04:05 am - Doc. Mirova_MODIS_VRP

On La Palma, the eruption of Cumbre Vieja continues.

The ash column reached an altitude of 4,500 meters and affected aviation operations during the morning.

At 5:20 pm local time, a series of major explosions was recorded.

The lava flows destroyed 44 more homes than the previous day, bringing the total to 390 buildings; 14 km of roads are impacted; they cover 180 hectares, increasing by 14 hectares in eleven hours.

La Palma - 23.09.2021 Watch the shock-wave on the right side and then a big lava bubble then a loud explosion. wow..

La Palma - Differential interferogram in ascending geometry between the dates of September 14-20, 2021 (left) and differential interferogram in descending geometry between the dates of September 16-22, 2021 Geohazards InSARLab (IGME-CSIC) Differential interferogram in ascending geometry between dates September 14-20, 2021 (left) and differential interferogram in descending geometry between dates September 16-22, 2021 (right), produced with Copernicus Sentinel-1 images. The negative direction of the bands indicates the approaches of the terrain to the satellite, while the areas with a positive direction indicate the distances from it. Each colored band represents ~ 2.8 cm of ground movement relative to the satellite. - Geohazards InSARLab (IGME-CSIC)

La Palma - Differential interferogram in ascending geometry between the dates of September 14-20, 2021 (left) and differential interferogram in descending geometry between the dates of September 16-22, 2021 Geohazards InSARLab (IGME-CSIC) Differential interferogram in ascending geometry between dates September 14-20, 2021 (left) and differential interferogram in descending geometry between dates September 16-22, 2021 (right), produced with Copernicus Sentinel-1 images. The negative direction of the bands indicates the approaches of the terrain to the satellite, while the areas with a positive direction indicate the distances from it. Each colored band represents ~ 2.8 cm of ground movement relative to the satellite. - Geohazards InSARLab (IGME-CSIC)

La Palma / Cumbre Vieja - advanced of the lava flows to 23.09.2021 / 06h - Copernicus Rapid Mapping Team Using COSMO-SkyMed radar imagery

La Palma / Cumbre Vieja - advanced of the lava flows to 23.09.2021 / 06h - Copernicus Rapid Mapping Team Using COSMO-SkyMed radar imagery

María José Blanco, director of the National Geographic Institute (IGN) of the Canary Islands, explained after the meeting of the Volcanic Emergency Plan Committee (Pevolca), that the slowing down of this flow -the other is stopped- n ' does not imply that the eruptive process has stopped.

The slowing down of the flow, which in some places reaches heights of twelve meters, is due to the fact that "it is more and more difficult to advance" because it loses temperature as it moves away from the cone, and because that it must pass through the "large volume" of material already deposited, which has also cooled on the surface.

 

The Minister of Public Works, Transport and Housing of the Government of the Canary Islands, Sebastián Franquis, announced on Thursday that his department is already managing the acquisition of a total of 257 housing units newly built, completed or nearing completion, on the island of La Palma, to face the housing emergency of hundreds of homeless families following the eruption

 

Sources : IGN, Pevolca, Diario de Avisos

Karymsky - photo archive Press Service of the Main Directorate of the Russian Emergency Ministry for the Territory of Kamchatka / 01.08.2021

Karymsky - photo archive Press Service of the Main Directorate of the Russian Emergency Ministry for the Territory of Kamchatka / 01.08.2021

In Kamchatka, moderate eruptive activity continues at Karymsky, which remains in aviation code orange.

Satellite data reveals that the explosions generated ash at more than 4,000 m. asl. ; the plume extends over 15 km. towards the northeast of the volcano.

These ash explosions can continue at any time, and disrupt low-altitude flights.

 

Source: KVERT - KSCNET

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