Sakurajima volcano news
Sakurajima volcano (Japan): explosive activity continues
Wednesday Feb 10, 2016 08:34 AM | DOOR: T
Small explosion at Sakurajima this morning
Thermal images of Sakurajima's craters (Kita-dake, l, and Showa crater, r) between 2 Dec 15 (bottom) and 6 Feb 16 (top) showing the presence of elevated temperatures in the Showa crater Feb (JMA)
It seems that the volcano is back to its typical activity of intermittent explosions at irregular intervals mostly ranging between few hours or even days. Following the explosion on 5 Feb, several others, mostly weaker ones, have occurred during the past days. Ash plumes recorded rose to 5-10,000 ft (1.5-3 km) altitude.
Deformation plots of several GPS stations (JMA)
JMA published a report (in Japanese) which shows that the decrease of activity which started to be noticeable last summer and led to the apparent pause in explosions Oct - Jan seems to correlate with a change in deformation. Around August, the year-long steady inflation stopped and changed to rapid deflation over a few weeks' period. This trend stopped and inflation began again around October.
A comparison of thermal images of the crater between 2 December 2015 and 6 February show elevated temperatures in the Showa crater, likely because of the presence of magma in the conduit closer to the surface.
Friday, Feb 05, 2016
After several months of unusual calm, the volcano had a moderately strong vulcanian explosion from the Showa crater this morning. An ash plume rose to approx. 10,000 ft (3 km) altitude. ... [meer...]
Wednesday, Nov 11, 2015
Activity at the volcano remains comparably low. During 2-6 November, only two small-scale eruptions occurred at the Showa Crater. Alert level is kept at 3 out of 5. [meer...]
Friday, Nov 06, 2015
Activity remains low. Only small-scale explosions occurred during the past weeks from the Showa crater. The Alert Level remains at 3 (out of 5). [meer...]
Friday, Oct 23, 2015
The volcano has been relatively calm during the past weeks. JMA reported small explosions at the Showa crater during 13-16 October. ... [meer...]
Friday, Sep 04, 2015
After 3 weeks with almost no or no significant explosions, the volcano seems to be back in its typical state of activity that has been going on for years (but been quite elevated during the past years in comparison): intermittent small to moderately sized vulcanian-type explosions from the Showa crater have resumed since 1 Sep, producing ash plumes that rose to heights of 5-9,000 ft (1.5 - 2.7 km) altitude. ... [meer...]