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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
 Shishaldin - Sentinel-2A L1C image from 02.01.2020 - Doc.Copernicus EMS - one click to enlarge

Shishaldin - Sentinel-2A L1C image from 02.01.2020 - Doc.Copernicus EMS - one click to enlarge

Shishaldin - Sentinel-2A L1C SWIR image from 02.01.2020 - Doc. Sentinel Hub - one click to enlarge

Shishaldin - Sentinel-2A L1C SWIR image from 02.01.2020 - Doc. Sentinel Hub - one click to enlarge

The Shishaldin still produces lava flows on the upper flanks and is the site of a short-lived explosive activity.

This December 3 around 9:30 am AKST, the seismicity started to increase, to lead to a brief period of emission of ash; the ash cloud reached an altitude of 7,300 meters asl. heading southeast, with lightning bolts.
The seismicity then abruptly decreased.

Shishaldin - RSAM from 03.01.2020 / 8:40 am to 04.01.2020 / 8:40 am - Doc.AVO

Thermal anomalies considered as very high, with a maximum at 1443MW, indicating a continuous effusion.

The aviation code is maintained at Orange, accompanied by a SIGMET up to an altitude of 7,300 meters established by the National Weather Service

 

Sources: AVO, NOAA, National Weather Service

Shishaldin - Thermal anomalies on 04.01.2020 / 7.20 am - Doc. Mirova
Shishaldin - Thermal anomalies on 04.01.2020 / 7.20 am - Doc. Mirova

Shishaldin - Thermal anomalies on 04.01.2020 / 7.20 am - Doc. Mirova

Shishaldin - satellite image of the ash plume and NOAA-NSW volcanic ash sigmet from 03.01.2020 / 19:42 UTC
Shishaldin - satellite image of the ash plume and NOAA-NSW volcanic ash sigmet from 03.01.2020 / 19:42 UTC

Shishaldin - satellite image of the ash plume and NOAA-NSW volcanic ash sigmet from 03.01.2020 / 19:42 UTC

A new explosion was reported this December 4 at 5:37 am in Suwanosejima, accompanied by an ash plume visible up to 400 meters, before entering the clouds; its direction is towards the south-east.

The volcanic alert level is at 2 / do not approach the crater.

Source: JMA

 Suwanosejima - 04.01.2020 / 05h40 - JMA webcam

 Suwanosejima - 04.01.2020 / 05h40 - JMA webcam

In Poas / Costa Rica, the Ovsicori recorded high gas levels in the Mirador del Volcán, due to the low wind speed and their unfavorable direction.

The 20 ppm SO2 and 7 ppm H2S registrations recorded, however, visits regulated by the Park Rangers and the corresponding security protocol are maintained.

No eruption is reported for this January 3.

Source: OVSICORI

Poas - the surface of the acid lake is rough - webcam Ovsicori 03.01.2020 / 09h38

Poas - the surface of the acid lake is rough - webcam Ovsicori 03.01.2020 / 09h38

Poas - the gases are pushed towards the Mirador del Volcán - webcam Ovsicori 03.01.2020 / 10h17

Poas - the gases are pushed towards the Mirador del Volcán - webcam Ovsicori 03.01.2020 / 10h17

Volcanologists from the Geophysical Institute of Peru (IGP) climbed last December to the Misti volcano and took thermal images of its crater.

The temperature of the gases expelled through the crater is between 120 ºC and 130 ºC.

The expulsion of water vapor and magmatic gases from the Misti crater is constant. According to previous studies, the main gases expelled correspond to sulfur dioxide and carbon dioxide.

The Misti, monitored since 2005, recorded an average of 45 earthquakes per day, which is a common value in this volcano; added to this is the degassing activity which could be enjoyed sporadically from the cities of Arequipa. Coropuna and Chachani. These parameters did not show any evidence associated with a possible awakening.

 

Source: I.G. Peru

Misti - crater inspection and thermal images - Doc. PGI

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