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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
Chikurachki - 22.08.2022 - photo S. Samoylenko / IVS FEB RAS KVERT

Chikurachki - 22.08.2022 - photo S. Samoylenko / IVS FEB RAS KVERT

According to observer data, an ash emission was observed from the Chikurachki volcano in the northern Kuril Islands on August 22, 2022. The explosions sent ash up to 2 km a.s.l., an ash plume rising was moving east of the volcano. KVERT continues to monitor the Chikurachki volcano.

Eruptive activity of the volcano is being observed. Ash explosions up to 6 km above sea level could occur at any time. Ongoing activity could affect low-flying aircraft. The aviation code has therefore changed from green to orange.

 

Source: KVERT

Fuego - image Sentinel-2 bands 12,11,5 dated 22.085.2022 - via Insivumeh - one click to enlarge

Fuego - image Sentinel-2 bands 12,11,5 dated 22.085.2022 - via Insivumeh - one click to enlarge

The Fuego observatory reports for this August 22, 2022 from 5 to 8 weak to moderate explosions per hour, which are accompanied by columns of ash at 4,500-4,800 m. asl. spreading west and south-west for more than 10 km.

Fine ash falls are recorded on Panimache I, Morelia, Santa Sofia, El Porvenir, Sangre de Cristo, Finca Palo Verde, Yrpocapa and their surroundings.

Incandescent pulses are observed at 100-200 m. above the crater, generating avalanches around the crater, some of which reach the limit of vegetation.

 

Source: Insivumeh

Sabancaya -  I.G.P. activity bulletin  from 15 to 21.08.2022

Sabancaya - I.G.P. activity bulletin from 15 to 21.08.2022

The I.G.Peru mentions a maintenance of moderate activity in Sabancaya in the week of August 15 to 21, 2022, characterized by a daily average of 33 explosions, generating gas and ash plumes up to 2,600 m. above the top.

During this week, the observatory detected 427 earthquakes of volcanic origin associated with the circulation of internal magmatic fluids, as well as VT earthquakes, linked to the fracturing of rocks.

No significant deformation anomalies.

Nine thermal anomalies, from max. 23 MW, have been identified, associated with the presence of a lava body on the surface of the crater.

The volcanic alert is maintained at naranja, as is the non-accessible zone of 12 km radius around the crater

 

Source: I.G.P.

Meradalur - Tremor at Fagradalsfjall station on 23.08.2022 - Hraun.vedur.is

Meradalur - Tremor at Fagradalsfjall station on 23.08.2022 - Hraun.vedur.is

Last night, lava flowing south of the main crater was visible at the Meradalur eruption site, although no harmonic tremors have been detected from the crater since yesterday morning.

It's not unheard of, according to a Met Office expert, who says it could be lava that's still cooling, but is from a time before the decline in activity. No harmonic tremors are detected now, but so far in this eruption and that of last year, tremors have been a strong sign of volcano activity. No activity was visible on the webcams last night.

Met Office scientists are not ready to call off the Meradalir eruption as there are expected to be no activity for at least a few days or even weeks before this announcement

 

Sources : mbls and Hraun.vedur

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