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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
 Pavlof  - photo d'archives / Pavel Izbekov, UAF- GI  AVO.

Pavlof - photo d'archives / Pavel Izbekov, UAF- GI AVO.

AVO has just increased the volcanic alert level from Pavlof to Advisory, and has passed the aviation code to Yellow, following an increase in seismicity over the last 24 hours, characterized by continuous tremor.

No eruptive activity or emissions at this time, but the Pavlof may erupt with little to no warning.

 

Source: AVO

Sabancaya - summary of the activity between September 14 and 20, 2020 - Doc. IGP

Sabancaya - summary of the activity between September 14 and 20, 2020 - Doc. IGP

The Geophysical Institute of Peru (IGP) reports that the eruptive activity of the Sabancaya volcano continues at moderate levels with an average of 37 daily explosions, accompanied by columns of gas and ash up to 2.5 km high at the summit of the volcano, scattered towards the south, south-east, east and north-east sectors of the volcano.

The IGP recorded and analyzed the occurrence of 1,899 earthquakes of volcanic origin, associated with the circulation of fluids

magmatic inside the Sabancaya volcano.

During this period, Volcano-Tectonic (VT) earthquakes were located mainly in the northeastern and northwestern regions of Sabancaya and exhibited magnitudes between M1.6 and M3.5. The representative earthquake (M3.5) was recorded on September 16 at 5:06 am, 14 km northwest of Sabancaya and 8 km deep.

The monitoring of the deformation of the volcanic structure, using GNSS equipment (processed with fast orbits), records a slight inflation of the southeast flank of the Sabancaya volcano and the northern sector of Hualca Hualca. Satellite monitoring identified the presence of 5 thermal anomalies with values ​​between 9 MW and 44 MW, associated with the presence of a lava body (dome) on the surface.

The volcanic alert level remains orange, with a prohibited area of ​​12 km in radius around the crater

 

Source: I.G. Peru

Reventador - Courtesy of F. Naranjo, IGEPN via GVP

Reventador - Courtesy of F. Naranjo, IGEPN via GVP

In Ecuador, the eruption continues at the Reventador; it is characterized by almost constant ash emissions reaching an altitude of 4,300 meters, drifting north-west.

A total of 61 explosions are counted for the day of September 20-21 / 11am.

Incandescence is observed at the summit crater, and the lava flow on the northeast flank is about 400 meters in length.

 

Source: IGEPN

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