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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
Fernandina - 05.09.2017 / 19h50 loc Fernandina - photo Galapagos Naciente / Twitter

Fernandina - 05.09.2017 / 19h50 loc Fernandina - photo Galapagos Naciente / Twitter

On Fernandina / Galapagos, the thermal anomaly remains very high on September 6, with 1,359 MW, but has dropped substantially since the eruption began, when Mirova reported 19,697 MW.
According to the Galapagos National Park Directory, a radial fissure on the southwest side of the volcano would be responsible for at least two main lava flows moving towards the ocean.


Sources: Mirova & Galapagos N.P.

Fernandina - Thermal anomaly remains high - 06.09.2017 / 4h loc. - Doc. Mirova Modis

Fernandina - Thermal anomaly remains high - 06.09.2017 / 4h loc. - Doc. Mirova Modis

Pacaya - photo Conred / 13.08.2017

Pacaya - photo Conred / 13.08.2017

 

Seismogram of the Pacaya - doc. Insivumeh - Special Bulletin of 04.09.2017 / 13h local


 
The activity of the Pacaya, which has been on the rise for a few days, is characterized by seismicity associated with the rise of the magma in the conduits and moderate strombolic explosions, which reach 40 to 80 meters above the Mackeney cone. A degassing column is observed at times, not exceeding 100 meters above the crater.


Source: Insivumeh - Special Bulletin of 04.09.2017 / 13h local.

Cauldron in the Vatnajökull Ice Cap - Screenshot from RÚV.

Cauldron in the Vatnajökull Ice Cap - Screenshot from RÚV.

Large holes, more than 400 meters wide, were formed in the Vatnajökull ice cap near the Bárðabunga area. The picture was taken by Ómar Ragnarsson on the Köldukvíslarjökull, a glacier emissary to the NW of the Vatnajökull.
Three years ago, seismic swarms under the Bárðabunga preceded the eruption at Holuhraun.
According to Magnús Tumi Guðmundsson, geologist, the whole landscape of the Bárðabunga changed after the eruption: an increase in geothermal heat melted the ice over a hundred meters and formed these cauldrons. It is the first time in hundreds of years that the ground can be seen under the glacier, and these formations could announce a possible jökulhlaup (a glacial debacle) following an accumulation of meltwater under the ice cap.


Sources:
- RÚV - Gat í gegnum jökulinn
- Iceland Review - Geothermal heat forms giant holes in glacier.

The fissure eruption in Holuhraun in September 2014 - photo Ragnar Og Ásdís

The fissure eruption in Holuhraun in September 2014 - photo Ragnar Og Ásdís

A beautiful winter photo of the Copahue, seen from Caviahue at the border Chilio-Argentina, this morning September 5.


Source: Valecaviahue / Twitter.

Copahue, seen from Caviahue - photo Valecaviahue / Twitter 05.09.2017 - a click to enlarge

Copahue, seen from Caviahue - photo Valecaviahue / Twitter 05.09.2017 - a click to enlarge

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