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Tokachidake volcano (Hokkaido, Japan): alert level raised, eruption warning

Wednesday Dec 17, 2014 14:02 PM | DOOR: T

Japanese authorities raised the alert level of the Tokachidake volcano to 2, as signs of volcanic unrest have recently increased. An access restriction is in place of 1 km radius around the crater left by the violent eruption in 1962 ("62-2 crater").
Volcanologist started to note an increase in seismic and fumarolic activity during 1995-2000 and again since 2006. In 2007, deformation of the volcanic edifice started to be noticed. Increased temperatures at depth were detected in 2008 using geomagnetic measurements.
In July 2012, JMA already raised the alert level from normal to 1, and reported increasing seismicity and incandescence (from hot gasses).
The last activity was a small eruption in 1988 and perhaps a phreatic explosion in 2004. Whether the current unrest will culminate in a new eruption in the near future is impossible to predict, but small to moderate-sized explosions, in particular if driven by overheated steam (phreatic) could occur any time, without warning.
Vorig nieuws
Lava flow map as of yesterday (USGS)
Tuesday, Dec 16, 2014
Zhupanovsky (Kamchatka, Russia): Intermittent ash emissions continue to occur from time to time from the volcano. A plume of volcanic ash at 14,000 ft (4.2 km) altitude extending ENE was reported last night (Tokyo VAAC). ... [meer...]
MODIS hot spots at Fogo volcano during the past 2 days - note the strong decrease compared to the image for the past 7 days(MODVOLC, Univ. Hawaii)
Monday, Dec 15, 2014
Fogo (Cape Verde): Lava emission has slowed down a lot, sign the eruption could be over soon. ... [meer...]

Saturday, Dec 13, 2014
Batu Tara (Sunda Islands, Indonesia): (12 Dec) During our recent expedition to Batu Tara, we witnessed a spectacular increase in activity during the night 3-4 Nov, culminating in a small pyroclastic flow triggered by a collapsing lava fountain and increased effusive activity from the dome. Andi and Till managed to capture the event on photos. ... [meer...]
Strong degassing and small explosions from Stromboli's summit vents yesterday (INGV Catania)
Friday, Dec 12, 2014
Stromboli (Eolian Islands, Italy): Activity has remained low - there is no lava effusion. At the vents in the summit craters, there are occasional small explosions and strong degassing. ... [meer...]

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