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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
 Etna Northeast crater - ash emission on 07.26.2021 / 8.50 p.m. GMT - photo © Pippo Scarpinati, da Sant'Alfio.

 Etna Northeast crater - ash emission on 07.26.2021 / 8.50 p.m. GMT - photo © Pippo Scarpinati, da Sant'Alfio.

From 18:20 UTC, a continuous emission of ash is observed at the level of the northeast crater of Etna. In the absence of wind, the ash plume reaches a height of about 6,000 m above sea level.

The minor event produced no incandescence, infrasound, or significant tremor signal. It ended after two hours.

 

Sources: INGV OE, Boris Behncke and Pippo Scarpinati

Etna crater Northeast - ash emission on 07/26/2021 - photo Boris Behncke

Etna crater Northeast - ash emission on 07/26/2021 - photo Boris Behncke

Etna - ash emission on 07/26/2021 / 8:50 p.m. - LAVE webcam Schiena del Asino

Etna - ash emission on 07/26/2021 / 8:50 p.m. - LAVE webcam Schiena del Asino

In Iceland, the activity of Fagradalsfjall continues. A glow is visible on the webcam at the level of the active cone from 00h until 6.30am. this 27 july . However, the amount of lava is slowly decreasing overall.

Culture Minister Lilja Dögg Alfreðsdóttir has officially confirmed the name of the newly created landscape around the volcanic eruption on the Reykjanes peninsula. The lava field will be called Fagradalshraun.

 

Sources: webcam & Iceland review

Fagradalsfjall - 27.07.2021 / 06:30 - webcam_langihryggur NV

Fagradalsfjall - 27.07.2021 / 06:30 - webcam_langihryggur NV

Fagradalsfjall - tremor at 27.07.2021 - Doc. Hraun.vedur

Fagradalsfjall - tremor at 27.07.2021 - Doc. Hraun.vedur

The IGEPN reports the activity observed at the Reventador on July 16:

a degassing plume (gas and ash) is observed up to 700 meters above the level of the crater, dispersing towards the west. The VAAC issued an emission alert observed in satellites 688 meters above the crater level in a northeast direction.
FIRMS records 3 thermal alerts and MIROVA records 1 low thermal alert in the last 24 hours.
At night, an incandescence was observed in the upper part of the volcano, in addition to the rolling of incandescent blocks up to 700 meters below the level of the crater on the northeast flank.

Reventador - 07.25.2021 / 6:50 p.m. local - webcam Copete IGEPN

Reventador - 07.25.2021 / 6:50 p.m. local - webcam Copete IGEPN

Light rains were recorded which generated signals associated with the decrease in mudslides and debris (lahars) at the Sangay volcano. This phenomenon has been recurring since the start of the activity in May 2019 and is due to the rains in the volcano remobilizing abundant volcanic materials accumulated in recent weeks.

As a precaution, it is recommended not to enter or approach the canals of the Volcán and Upano rivers.
The VAAC reported 4 emission alerts observed in satellites with altitudes of up to 870 meters above crater level to the west.
No thermal alerts have been recorded in the last 24 hours.

 

Source: IGEPN

Sabancaya - activity from July 19 to 25, 2021 (bifid plume) - photo I.G. Peru

Sabancaya - activity from July 19 to 25, 2021 (bifid plume) - photo I.G. Peru

The eruptive activity of the Sabancaya volcano remained at moderate levels from July 19 to 25, 2021, an average of 58 daily explosions, accompanied by plumes of ash and gas up to 2,300 m above the summit of the volcano.

The IGP recorded and analyzed 1,176 earthquakes of volcanic origin, associated with the circulation of magmatic fluids within the Sabancaya volcano. During this period, Volcano-Tectonic (VT) earthquakes associated with rock fracturing were located mainly in the North, North-East, North-West and South-West of Sabancaya, of magnitudes between M1, 8 and M3.9.

The monitoring of the deformation of the volcanic structure using GNSS techniques (processed with fast orbits) does not present any significant anomalies. However, an inflation process was observed in the northern sector (around the Hualca Hualca volcano).

Satellite recordings have identified the presence of 9 thermal anomalies ((maximum value of VRP 162 MW on 07/24 - Mirova) associated with the presence of a lava body on the surface of the volcano's crater.

 

Source: I.G. Peru.

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