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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
 Shinmoedake - explosion of 10.03.2018 / 01h55 - JMA webcam

Shinmoedake - explosion of 10.03.2018 / 01h55 - JMA webcam

 Shinmoedake - explosion of the 10.03.2018 / 04h27 - webcam JMA

Shinmoedake - explosion of the 10.03.2018 / 04h27 - webcam JMA

At Shinmoedake, the lava cake has an overflow front that does not progress much.

The gases, which are struggling to evacuate, caused two strong explosions on March 10, respectively at 1:55 and 4:25, according to the JMA. They were accompanied by projections of blocks up to 1,800 meters from the crater, and plumes of ash that rose to more than 4,500 meters above it.

The JMA extended the restriction zone from 3 to 4 km.

Professor Tetsuva Nakada of the Tokyo University Earthquake Research Institute, familiar with the Shinmoedake eruptions, confirms that gas pressure has increased in the lava-covered crater, generating an explosive eruption. In 2011, such explosions continued for two months.

Sources: JMA and NHK News

Shinmoedake - overflow of the lava - photo Mainichi 09.03.2018

Shinmoedake - overflow of the lava - photo Mainichi 09.03.2018

Explosive eruption of Shinmoedake volcano in the early March 10, 2018. Explosive sound reached the shooting point 30 seconds after the eruption. Fumes altitude 4,500 m. Before the eruption, a shooting star over the crater.

Shinmoedake - 10.03.2018 / 6h22 and 6h56 - one click to enlargeShinmoedake - 10.03.2018 / 6h22 and 6h56 - one click to enlarge

Shinmoedake - 10.03.2018 / 6h22 and 6h56 - one click to enlarge

 Shinmoedake - 10.03.2018 / 11:59 and 18:59 - one click to enlarge Shinmoedake - 10.03.2018 / 11:59 and 18:59 - one click to enlarge

Shinmoedake - 10.03.2018 / 11:59 and 18:59 - one click to enlarge

The Poas Acidic Lake is reduced to small, meteoric, sediment-rich basins of water, due to high evaporation rate, increasing ambient temperature, and solar radiation, coupled with typical low precipitation levels from the dry season, which runs from February to April.

These basins contain a milky pale green water, indicating a low-flow of low-temperature hydrothermal gas outlet through the bottom of the crater.

This phenomenon has occurred repeatedly in previous years, not in connection with eruptive activity, but in connection with polluting emanations and dangerous for the health of fragile people, the lake no longer playing its buffer role.

Source: Ovsicori & RSN

Poas - Acid Lake 1 ° March 2018 - photo Federico Chavarría-Kopper

Poas - Acid Lake 1 ° March 2018 - photo Federico Chavarría-Kopper

Poas - the 03.03.2018 / 9:38 - webcam Ovsicori

Poas - the 03.03.2018 / 9:38 - webcam Ovsicori

Poas - 05.03.2018 - increase of degassing and reduction of acidic lake to puddles - photo Raul Mora

Poas - 05.03.2018 - increase of degassing and reduction of acidic lake to puddles - photo Raul Mora

Poas - 10.03.2018 / 9h56 - Ovsicori webcam

Poas - 10.03.2018 / 9h56 - Ovsicori webcam

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