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Volcanic activity worldwide 12 Dec 2013: Sinabung, Nishino-shima, Klyuchevskoy, Merapi, Etna

Thu, 12 Dec 2013, 14:56
14:56 PM |
The New SE crater today
The New SE crater today
Ash emission from Klyuchevskoy volcano this morning
Ash emission from Klyuchevskoy volcano this morning
Comparison of the new Island off Nishino-shima between 20 Nov (surtseyan activity) and 10 Dec (end of strombolian and effusive? activity) (screenshots and annotations by Blog Culture Volcan)
Comparison of the new Island off Nishino-shima between 20 Nov (surtseyan activity) and 10 Dec (end of strombolian and effusive? activity) (screenshots and annotations by Blog Culture Volcan)
Degassing from Sinabung volcano
Degassing from Sinabung volcano
Etna (Sicily, Italy): The situation has remained more or less unchanged. Etna has been quiet except intense degassing from the NE crater and a faint plume from the NSEC. There are currently no signs of the expected next paroxysm at the New SE crater and tremor has decreased overall during the past days (of course, this can change quickly).

Klyuchevskoy (Kamchatka): Low-level ash emissions continue.

Nishino-shima (Volcano Islands, Japan): Activity has decreased significantly over the past days. A video from 10 December shows no more strombolian explosions, only degassing and no significant changes to the size of the island compared to a week ago. It is possible that there is still weak effusion of lava, but it appears that the eruption could have come to an end.

Sinabung (Sumatra, Indonesia): No ash emissions have been detected during the past 48 hours, the crater shows only a degassing plume, but alert level remains at red, because new explosions could occur any time. The government has extended the emergency status until at least 21 December, which implies that the more than 17,000 evacuees remain in the total of 31 shelters. Their situation is difficult, with help needed in form of food, water, medicines and sanitary supplies.
Blog Culture Volcan has posted an interesting comparison of clear webcam images over the past weeks, that illustrate the progressive opening of 3 distinct vents. This also helps explaining the observed shift from discrete vulcanian explosions towards semi-continuous ash venting: as more vents became available, it is easier for the volcano to release gas and thus, decrease pressure build-up.

Merapi (Central Java): Another small phreatic explosion occurred at the summit lava dome this morning at 08:10 local time. it produced an ash plume rising 500 m. According to VSI, rainwater infiltration into the hot rocks of the dome caused the eruption.

Previous news

Wed, 11 Dec 2013, 17:03

Volcanic activity worldwide 11 Dec 2013: Shiveluch, Sakurajima

Glowing avalanche from Shiveluch's lava dome today (KVERT webcam)
Shiveluch (Kamchatka): The lava dome continues to grow, producing incandescent avalanches on to the SW and SE as well as small explosions, visible on the following video from today's activity in time-lapse: ... Read all
Tue, 10 Dec 2013, 15:56

Volcanic activity worldwide 10 Dec 2013: Sinabung, Santa María / Santiaguito, Pacaya, Fuego, Klyuch...

Etna's NSEC this evening
Etna (Sicily, Italy): The New SE crater has remained calm; after the increase yesterday, tremor has descended back to low levels and continues to fluctuate. ... Read all
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