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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
 Bezymianny - 20.12.2017 - photo Yu. Demyanchuk. IVS FEB RAS, KVERT

Bezymianny - 20.12.2017 - photo Yu. Demyanchuk. IVS FEB RAS, KVERT

The Bezymianny shows steam degassing, after its strong explosion on December 20 at 3:55 am, which left ashes on a long area that extends to the ocean to the east.

The eruptive activity remains present, characterized by a thermal anomaly oscillating between 21 and 22 December between 4 and 19 MW.

KVERT lowered the aviation code to orange

Sources: KVERT & MIROVA

Bezymianny - Thermal anomaly at 22.12.2017 / 2:45 - Doc. Mirova Modis
Bezymianny - Thermal anomaly at 22.12.2017 / 2:45 - Doc. Mirova Modis

Bezymianny - Thermal anomaly at 22.12.2017 / 2:45 - Doc. Mirova Modis

Bezymianny - plume and ash covered zone - image Nasa Eosdis Worldview 22.12.2017

Bezymianny - plume and ash covered zone - image Nasa Eosdis Worldview 22.12.2017

The Agung is always surmounted by a plume of white-gray gas and steam, thick and under pressure, reaching 500 to 1,000 meters above the summit.

The seismicity remains in the norm, with this December 22, a dominant of continuous tremor with an amplitude of 2 mm.

Source: PVMBG & BNPB

The Agung and its plume this 22.12.2017 / 6h15 - webcam Telkomsel

The Agung and its plume this 22.12.2017 / 6h15 - webcam Telkomsel

Offering to the deities - Agung 22.12.2017 / 6h45 - photo BNPB

Offering to the deities - Agung 22.12.2017 / 6h45 - photo BNPB

Two earthquakes of magnitude greater than 4, considered strong, were observed in Bárðarbunga on 20 December, the first at 4:57 at a depth of 2.2 km, 4.5 km NE of the center of the caldera, the second to 5:29 am at a depth of 1.1 km, 6.8 km E-NE of the caldera. They were followed by a swarm of a dozen smaller earthquakes. According to the Met Office, there are no signs of imminent eruption.

The Bárðarbunga has shown significant seismic activity since the end of the eruption at Holuhraun 2014-2015, presumably caused by a recharge of the magma chamber. In recent months, a new geothermal zone has opened in the caldera, and this activity has created two cauldrons in the ice cover.

Sources: IMO, Icemand Review, and RUV

Earthquakes under the Bárðarbunga - Doc. IMO 21.12.2017 / 17:10 GMT
Earthquakes under the Bárðarbunga - Doc. IMO 21.12.2017 / 17:10 GMT

Earthquakes under the Bárðarbunga - Doc. IMO 21.12.2017 / 17:10 GMT

The two newly formed cauldrons in the Bárðarbunga caldera - Photo Tómas Guðbjartsson via Iceland Review

The two newly formed cauldrons in the Bárðarbunga caldera - Photo Tómas Guðbjartsson via Iceland Review

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