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Earth of fire

Actualité volcanique, Article de fond sur étude de volcan, tectonique, récits et photos de voyage

Publié par Bernard Duyck
Publié dans : #Actualités volcaniques

The Icelandic authorities will place various panels around the volcano Hekla , warning of a possible eruption. They are in Icelandic and English, and will include a QR code to download an application and receive an alert call for the onset of eruption. It is indeed risky to venture on the volcano, because it can erupt without giving you time to evacuate the area : in recent events in 1970, 1980, 1991 and 2000 , scientists had only 30-80 minutes to issue an evacuation notice . ( Iceland Review on line )

Hekla in eruption in 2000 - photo Sigurson Sidrasson / IMO

Hekla in eruption in 2000 - photo Sigurson Sidrasson / IMO

According mbl.is site, there are now more magma in the magma chamber before Hekla last erupted , and since 2006. The magma chamber is located 10-20 km. depth , and inflation of the volcano can be clearly noticed on the surface, but only by the GPS network IMO / Univ. Iceland Geology Dpt . A possible eruption depends on the mobile fraction of the magma in the magma chamber . The risk is present, and the latency to transmit a danger opinion is short ! (mbl.is/ Páll Einarsson mbl.is / Páll Einarsson , professor in geophysics at the University of Iceland )

Nishino -shima 14/03/2014 - two cones with a strombolian activity  - photo Ryo Mochizuki / You Tube

Nishino -shima 14/03/2014 - two cones with a strombolian activity - photo Ryo Mochizuki / You Tube

In the Ogasawara Islands, Nishino -shima volcano ever present Strombolian activity. A video on You tube taking from cruise ship reveals an island surmounted by a large plume of steam and surrounded by steam, due to the lava entering the sea and / or benefits of strombolian activity , clearly visible at night. The author of the video also indicates a large area of discolored water .

The Dukono on the island of Halmahera / Moluccas always present an explosive activity , Strombolian type , on March 18 marked by a rising ash plume 2,400 meters before spreading to the SO on 80 nautical miles . ( VAAC Darwin / via Volcanodiscovery )

 


On the island of Java, the Slamet , in alert 2 and banned of access , has an activity characterized by small explosions.  A Volcanodiscovery guide , Andy , said that explosions are visible Blambangan village , but because of the ban, the dome is not visible.

 

Slamet / Java - 03/14/2014 gaz venting - photo Andy ( Volcanodiscovery guide )

Slamet / Java - 03/14/2014 gaz venting - photo Andy ( Volcanodiscovery guide )

In Mexico, the Fuego de Colima present intermittent explosions, whose number reached one hundred per day . Most explosions are phreatic type, accompanied by a white plume . Extrusion of lava accompanied by avalanches of incandescent blocks is visible at night . ( Diario de Colima )

Fuego de Colima - 16/03/2014 - J.Carlos Gavilanes Ruiz

Fuego de Colima - 16/03/2014 - J.Carlos Gavilanes Ruiz

Colima -  summit activity, projections and avalanche of incandescent blocks - 09.03.2014 / 10:27 p.m. - photo Tapiro Foto

Colima - summit activity, projections and avalanche of incandescent blocks - 09.03.2014 / 10:27 p.m. - photo Tapiro Foto

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