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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 the summit craters - the traces of the 1st paroxysm, and the thermal anomaly before the 2nd paroxysm - Image Sentinel-2 bands11,8,2 of 21.02.2022 - one click to enlarge

Etna the summit craters - the traces of the 1st paroxysm, and the thermal anomaly before the 2nd paroxysm - Image Sentinel-2 bands11,8,2 of 21.02.2022 - one click to enlarge

From the early hours of the morning, a weak Strombolian activity at the level of the South-East Crater of Etna is observed.
The average amplitude of the volcanic tremor, from about 08:00 UTC, gradually increases.

At 09:07 (08:07 UTC), a parameter change
In particular, a thermal anomaly is observed from the surveillance cameras. The anomaly occurs at the level of the Southeast crater.

Etna SEC - Strombolian activity on 21.02.2022 in the morning - photo Boris Behncke - one click to enlarge

Etna SEC - Strombolian activity on 21.02.2022 in the morning - photo Boris Behncke - one click to enlarge

Etna - thermal anomalies on 02.22.2022 / 00:20 - Doc. Mirova_MODIS_Latest10NTI

Etna - thermal anomalies on 02.22.2022 / 00:20 - Doc. Mirova_MODIS_Latest10NTI

At 12:24 (11:24 UTC) The INGV announces that a lava fountain is in progress at the Southeast Crater. The volcanic cloud has reached a height of about 10 km., and is moving towards the southeast.
Around 10:40 UTC, a further increase in the average amplitude of the volcanic tremor is observed, which is currently at high levels. The centroid of the sources of volcanic tremors continues to be located in the SE zone of the crater at an altitude of approximately 2800-2900 m above sea level. An increase in infrasonic activity is observed which is near from the Bocca Nuova crater.

Etna SEC - 2nd paroxysm / lava fountain at 11:27 a.m. on 21.02.2022 - INGV therm webcam

Etna SEC - 2nd paroxysm / lava fountain at 11:27 a.m. on 21.02.2022 - INGV therm webcam

Etna SEC - 2° paroxysm / lava fountain on 21.02.2022 photo Gio Giusa - one click to enlarge

Etna SEC - 2° paroxysm / lava fountain on 21.02.2022 photo Gio Giusa - one click to enlarge

From 11:10 GMT, from the images of the INGV-OE surveillance cameras, an overflow of lava from the Southeast Crater propagating towards the SW is observed. The volcanic cloud also reached a height of at least 11 km above sea level.

Catania airport has been temporarily closed.
The average amplitude of the volcanic tremor is still at very high levels. The centroid of volcanic tremor sources is located in the southeast crater region at an altitude of about 2900-3000 m above mean sea level.

Etna - tremor at 22.02.2022 / 07h - Doc. INGV

Etna - tremor at 22.02.2022 / 07h - Doc. INGV

Etna SEC & BN - 21.02.2022 / 1:36 p.m. - photo © Pippo scarpinati - click to enlarge

Etna SEC & BN - 21.02.2022 / 1:36 p.m. - photo © Pippo scarpinati - click to enlarge

At 14:12 (13:12 UTC) INGV reports that the lava fountain southeast of the crater has ceased. The volcanic cloud produced by the explosive activity has reached an estimated height of about 12,000 m above sea level and is dispersing towards the South-South-East. INGV-OE personnel in the field report a fallout of volcanic ash at Viagrande, Trecastagni and Zafferana. The lava flow produced by the ongoing activity southeast of the crater is still fed.
From around 12:10 UTC, there is a rapid decrease in the average amplitude values ​​of the volcanic tremor, which settle on an average level with a decreasing trend.

Etna SEC - 21.02.2022 / 1:41 p.m. - photo © Pippo scarpinati - click to enlarge

Etna SEC - 21.02.2022 / 1:41 p.m. - photo © Pippo scarpinati - click to enlarge

At 15:53 ​​​​​​(14:53 UTC) INGV reports that from the images of surveillance cameras and INGV-OE personnel in the field, a weakly fed flow is observed, which s extends towards the E and whose lava front remains confined to the summit zone reaching an altitude of approximately 2900 m. In addition, the flow that propagates in the SW direction is always fed.


INGV reports at 6:21 p.m. that explosive activity at the southeast crater has ceased. INGV-OE field staff observed fallout of volcanic ash produced during lava fountaining in the towns of Viagrande, Milo and Acicastello, with the main axis of dispersal between Petrulli and Zafferana.
With regard to the effusive activity, the lava flows which propagate in the direction of the South-West and the East are still weakly fed. The average amplitude of the volcanic tremor, from about 14:00 UTC after some fluctuations around the average values, showed a new tendency to decrease, currently settling at levels
low to medium.

 

Sources: INGVoe, INGVvulcani, Photos by Boris Behncke, Pippo Scarpinati, Gio Giusa

Sabancaya - activity report between 14 and 20.02.2022 - doc. I.G.P.

Sabancaya - activity report between 14 and 20.02.2022 - doc. I.G.P.

I.G.Peru reports that Sabancaya activity remained at moderate levels between February 14 and 20, 2022; An average of 23 daily volcanic explosions, accompanied by plumes of gas and ash reaching 1,700 m. above the summit, were observed.

The observatory detected and analyzed 155 earthquakes of volcanic origin, associated with the circulation of internal magmatic fluids; VT earthquakes, linked to rock fracturing, always concern a western sector.

No significant deformation anomalies; two thermal anomalies, with a max. of VRP 10MW, have been identified, in connection with the presence of a superficial lava body in the crater.

The volcanic alert remains at naranja, associated with a non-accessible zone of 12 km. radius around the crater

 

Source: I.G.P.

Telica - 21.02.2022 / 09:42 - Ineter webcam

Telica - 21.02.2022 / 09:42 - Ineter webcam

Briefly, activity continues at Sangay, Reventador and Wolf volcanoes in Ecuador, at Telica in Nicaragua, and Suwanosejima in the Kuriles.

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