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Tokachi volcano (Hokkaido, Japan) activity update: steaming, increased earthquake activity

Saturday Dec 01, 2012 11:05 AM | BY: T

Fumes at the Taisho crater rose to heights of up to 100 m above the crater rim, and have remained at relatively high levels since May 2010. Plume activity at the 62-2 crater has remained at low levels and a white plumes were observed rising to a height of up to 100 m above the crater rim.
Seismic activity remained at low levels in November. Volcanic earthquake activity temporarily increased from midday to the evening of December 2nd, with hypocenters located at depths of 1 km below sea level to the east of the Ground crater. Magnitude 2.2 and 2.0 earthquakes occurred at 13:37 JST and 13:49 JST on the same day.
According to reports from Biei Town and first-hand accounts collected by the Local Metrological Observatory, the first of these was felt in the Shirogane and Tokachidake hot spring areas located at the foot of the mountain, while the second was felt in the Shirogane area only. These were the first earthquakes felt in the area since June 25th,
2000. Seismic activity had decreased by the night of December 2nd. No volcanic tremors were observed during these events.
According to GPS observation data, ground deformation at Maetokachi indicating inflation of shallow parts at the 62-2 crater had continued since 2006, but this tendency may have slowed since this April. No change indicating ground deformation in deeper parts was observed.
(Source: JMA Monthly Volcanic Activity Report, November 2012)
Previous news
Wednesday, Nov 28, 2012
The Tokyo VAAC reported that an eruption of Tolbachik, Kamchatka began at around 10:45 (GMT). An initial ash plume rose to a height of 10 KM; ash was seen in satellite images. ... [more]
Monday, Nov 26, 2012
The GeoNet stated on Facebook that 1% of ejected material from the November 21 eruption of Tongariro was fresh magma. ... [more]
Thursday, Nov 22, 2012
Strombolian activity has resumed at the New SE crater of Etna volcano in Italy. Tremor began rising on 20 November. On the night of 21 November, incandescence was seen in Etna's New Southeast crater. Incandescence was last observed from the crater in April 2012.On 22 Nov, a swarm of earthquakes has started in the NW sector of the volcano at depths mostly around 20 km. ... [more]
Tuesday, Nov 20, 2012
Ash explosions occur almost each day at Paluweh volcano (Rokatenda) off Flores, Indonesia. The activity seems to be increasing. The largest explosions have produced plumes rising up to 3 km altitude. ... [more]

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