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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 : #Actualités volcaniques
Copahue - photo Sernageomin 24.03.2018 / 14h44

Copahue - photo Sernageomin 24.03.2018 / 14h44

The Sernageomin raised the technical alert level of the Copahue from green to yellow, on March 24, 2018, following the explosion of hydrothermal character of March 24 at 14:42 local, accompanied by a plume rising to 1,000 meters above the crater , and bottom tremor level above normal.

Source: SERNAGEOMIN

Copahue de Baños De Copahue, Neuquen, Argentina - 24.03.2018 / 14h40 - photo  Silvy Erice. / FB

Copahue de Baños De Copahue, Neuquen, Argentina - 24.03.2018 / 14h40 - photo Silvy Erice. / FB

Crater of the Chaparrastic 23.03.2018 - photo SNET
Crater of the Chaparrastic 23.03.2018 - photo SNET

Crater of the Chaparrastic 23.03.2018 - photo SNET

In Chaparrastique / San Miguel, El Salvador, the SNET reports a weak and continuous degassing at the central crater scattered on the south-west flank. Seismicity is related to the movement of internal fluids.

During the last 24 hours, the number of earthquakes has varied between 51 and 127 RSAM units, for a normality threshold set at 150 units. Carbon dioxide and water vapor do not come from a magmatic source, nor are there any changes or correlations with magmatic sulfur dioxide.

MARN continues to monitor the volcano and recommends keeping away of the top of the volcano, due to possible and sudden changes in behavior

Sources:

- MARN

- SNET - link
 

Chaparrastique - RSAM from March 17 to 23, 2018 - Doc.SNET

Chaparrastique - RSAM from March 17 to 23, 2018 - Doc.SNET

At the Shinmoedake, explosions were recorded this March 25 at 7:35 and 8:45, accompanied by plumes of gas and ash at 3,200 meters in height. These are the first since March 15th.

The second explosion was accompanied by a pyroclastic flow over 800 meters west of the crater, and a co-pyroclastic plume. The pyroclastic flow did not approach a residential area.

Tornadoes of dust have been observed, remobilising the ashes deposited on overheated soil.

 

Sources: Asahi shimbun & JMA

Shinmoedake - eruptive plumes and co-pyroclastic 25.03.2018 at 8:46 and 8:48 - webcam JMA
Shinmoedake - eruptive plumes and co-pyroclastic 25.03.2018 at 8:46 and 8:48 - webcam JMA

Shinmoedake - eruptive plumes and co-pyroclastic 25.03.2018 at 8:46 and 8:48 - webcam JMA

Shinmoedake - Volcanic ash advisory on 25.03.2018 - VAAC Tokyo

Shinmoedake - Volcanic ash advisory on 25.03.2018 - VAAC Tokyo

Shinmoedake - degassing of the dome and "Ash twisters" - NHK photo

Shinmoedake - degassing of the dome and "Ash twisters" - NHK photo

More than 80,000 residents around the Mayon, in the cities of Daraga, Tabaco, Camalig, Guinobatan, Malilipot, Sto. Domingo, Ligao and Bacacay should be evacuated due to the threat of lahar, according to Bicol's civil defense.

Intense rainfall can remobilize newly extruded materials; out of a total of 65 million cubic meters, 13 million cubic meters can be covered by the lahars. The most affected drainages are the Basud and Quirangay drainage.

Source: Philstar

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