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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
Mayon - Pyroclastic flow from Lignon Hill Observatory on 16.01.2018 - photo Phivolcs-Dost

Mayon - Pyroclastic flow from Lignon Hill Observatory on 16.01.2018 - photo Phivolcs-Dost

The eruptive activity of the Mayon was characterized, during the last 24 hours, by a quiet effusion at the dome, generating a lava flow of three km. in Miisi drainage, and fourteen collapses of blocks.

Ten pyroclastic flows were recorded by the seismic network.

During the night, incandescence is observed in the crater, as well as falling incandescent blocks in the Miisi drainage.

The volcano remains inflated by a magma intrusion since November 2017.

Source: Phivolcs 21.01.2018 / 8am

Complex Nevados de Chillan - new risk map, with blue 4 km restriction zone - doc. SERNAGEOMIN

Complex Nevados de Chillan - new risk map, with blue 4 km restriction zone - doc. SERNAGEOMIN

Sernageomin has published a risk map for the Nevados de Chillan complex, with the restriction zone (in blue) remaining at 4 km. The alert level remains in Amarilla.

On the basis of the last overflights of 9 and 12 January, and satellite images, Sernageomin determined that the beginning of the extrusion of the dome dates back to December 20 of last year, and a dome growth rate of 1.360 m³ / day, which seems weak. The estimated total volume is about 37,000 m³. The dome remains inside the active crater, without exceeding the level of the edges.

Source: Sernageomin / Twitter.
 

Complex Nevados de Chillan - presence of a dome in the active crater - photo Sernageomin 12.01.2018

Complex Nevados de Chillan - presence of a dome in the active crater - photo Sernageomin 12.01.2018

Nevados Complex of Chillan - dome growth between 20.12.2017 and 14.01.2018 - Doc. SERNAGEOMIN

Nevados Complex of Chillan - dome growth between 20.12.2017 and 14.01.2018 - Doc. SERNAGEOMIN

The activity of the Pacaya is maintained, characterized by weak Strombolian explosions, which constantly build and destroy the cone of slag established in the crater Mackenney.

Since 3 am on January 20, the observatory of Pacaya reports a lava flow that descends from the crater over 400 meters on the west flank, in the collapse zone.

The activity remains in the norms.

Sources: Insivumeh & Conred

Pacaya - January 2018 - photo Cusuko fotografia via Facebook

Pacaya - January 2018 - photo Cusuko fotografia via Facebook

In Poas, where the recorded seismic activity has remained low for a few days and where only degassing is observed, without ash emissions, a new acidic lake has appeared. Fueled by the constant rains for weeks and the closure of the drainages, the waters of the acidic lake now cover all smokers ... which will reduce air pollution. The water temperature should be around 60 ° C.

Sources: RSN & Ovsicori

2018.01.20 12h29 Poas - new crater lake - webcam RSN 20.01.2018 / 12:29

2018.01.20 12h29 Poas - new crater lake - webcam RSN 20.01.2018 / 12:29

Poas - for comparison, the crater on 29.12.2017 and 01.01.2018 - Ovsicori webcam
Poas - for comparison, the crater on 29.12.2017 and 01.01.2018 - Ovsicori webcam

Poas - for comparison, the crater on 29.12.2017 and 01.01.2018 - Ovsicori webcam

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