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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 fumarole activity of the lava dome of Molodoy Sheveluch volcano on 24 January, 2020. - photo Y.Demyanchuk /  IVS FEB RAS KVERT

The fumarole activity of the lava dome of Molodoy Sheveluch volcano on 24 January, 2020. - photo Y.Demyanchuk / IVS FEB RAS KVERT

The explosive-extrusive eruption of Sheveluch continues in the Kamchatka Peninsula.

This March 25, 2020, the KVERT reports an ash explosion with a plume at 3,300-3,500 meters asl., extending over 45 km to the north.

The Sheveluch dome rises to 2,500 meters, for a maximum height of the volcano at 3,283 meters.

Mirova reports a 20 MW VRP thermal anomaly on 03/25/2010 / 12:05 a.m.

The aviation code remains orange, other ash explosions can occur at any time.

 

Sources: KVERT, VAAC Tokyo and Mirova

Sheveluch - volcanic ash advisory on 25.03.2020 / 06h00Z - Doc. VAAC Tokyo

Sheveluch - volcanic ash advisory on 25.03.2020 / 06h00Z - Doc. VAAC Tokyo

The Geophysical Institute of Peru (IGP) reports that the eruptive activity of the Sabancaya volcano remains at moderate levels, with the continuous recording of moderate explosions and the consequent emission of ash and gas.

Nineteen daily explosions of medium to low intensity were recorded, accompanied by plumes of gas and ash up to 3,000 meters above the summit of the volcano, scattered towards the southwest and south sectors of Sabancaya.

At the seismic level, 738 earthquakes of volcanic origin associated with the circulation of internal fluids were recorded.

The monitoring of the deformation of the volcanic structure records significant anomalies.

Satellite surveillance allowed the presence of a thermal anomaly of a value of 1 MW, associated with the presence of a body of lava on the surface of the crater.

Consequently, for the following days, no significant change is expected regarding its activity. The volcanic alert remains orange, with an approach ban within a radius of 12 km around the crater.

 

Source: I.G. Peru
 

Sabancaya - Summary of the activity between 16 and 22 March 2020 - Doc. IGPeru

Sabancaya - Summary of the activity between 16 and 22 March 2020 - Doc. IGPeru

Analysis of the images recorded by the cameras located at 400, 190 and Punta dei Corvi made it possible to characterize the eruptive activity of Stromboli.

During the period from March 16 to 22, 2020, the explosive activity was mainly produced by at least 3 (three) eruptive vents located in the area of ​​the North crater and at least 3 (three) eruptive vents located in the area of Center-South crater. All the vents are placed inside the depression which occupies the crater terrace.

 Stromboli - activity from 23.03.2020 / 17h23 - SQV  webcam / INGV

 Stromboli - activity from 23.03.2020 / 17h23 - SQV webcam / INGV

In the northern zone, the explosions were mainly of low to low intensity (less than 80 m high) to high (more than 150 m high) of coarse materials (lapilli and bombs); the abundant fallout has covered the outer slopes of the area overlooking the Sciara del fuoco and the blocks are rolled until they reach the coast line.

The INGV specifies that on March 19 from 2:50 p.m. UTC and until 4:30 p.m. UTC, intense spattering activity animated one of the north mouths overlooking the Sciara del fuoco, and gave birth to a modest rheomorphic flow in the upper part of the Sciara for a few hundred meters. the

the average frequency of explosions in the North zone was variable, between 7 and 9 events / h.

 

The explosive activity of the Center-South zone caused explosions of mainly fine materials (ashes) mixed with large grains of medium to high intensity (150-250 m in height). The frequency of explosions from the CS area was variable, between 5 and 16 events / h.

 

No significant variation in seismology and deformation. The flow of sulfur dioxide remained at an average level.

 

Source: INGV - weekly bulletin March 16 to 22, 2020 / issued on March 24. - link

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