Hakone volcano news & activity updates:
Hakone volcano (Japan): small explosion on 29 June, seismic crisis
Wednesday Jul 01, 2015 11:05 AM | BY: T
Following a small explosion in the Owakudani hydrothermal area and increased seismic activity, the alert level of the volcano was raised to 3 (on a scale of 1-5) on 30 June.
A seismic crisis occurred on 29 June starting at 7:36 am (local time). Most tremors were small, but almost 140 quakes occurred within less than half an hour.
Cloud cover prevented direct observations, but a fine ash deposit was detected afterwards on the parking area near Owakudani, indicating that a small explosion had occurred, probably phreatic in origin.
Deformation of the Owakudani valley had reached more than 30 cm uplift since October 2014.
Friday, May 22, 2015
Unrest at the Owakudani valley continues. Fumarolic activity has increased drastically. Ground has lifted by up to 15 cm during 7-21 May, or up to 20 cm when compared to early October last year. [more]
Thursday, May 07, 2015
An eruption warning has been declared for the volcano, as increased seismic activity under the Ōwakudani hydrothermal field were registered during the past days and could herald sudden phreatic explosions. ... [more]
Hakone volcano (Honshu, Japan): increased seismicity and deformation worries scientists about possible new eruptions
Friday, Mar 01, 2013
The latest bulletin of the Japan Meteorological Agency mentions that an increase in seismicity since January 11 near the intra-caldera dome Komagatake is beginning to worry scientists about a possible new activity. ... [more]