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Sakurajima volcano (Kyushu, Japan) activity update

Monday Jul 22, 2013 04:47 AM | BY: T

Explosion with lightnings from Sakurajima at 20:02 on 21 July
Explosion with lightnings from Sakurajima at 20:02 on 21 July
Eruption column from the explosion at 20:02
Lightning inside the eruption cloud about 1 hour after the explosion
Lightning inside the eruption cloud about 1 hour after the explosion
A strong vulcanian explosion occurred last night at 11:02 GMT (20:02 local time), following several hours of near complete calm at the volcano. A loud cannon-shot bang accompanied the explosion, which generated a large mushroom cloud that reached 12,000 ft (3.7 km) altitude and engulfed the NE half of the Sakurajima peninsula and was followed by several smaller ones within about half an hour.
The volcano and much of the surrounding areas remained under the ash plume for several hours until it started to clear up again. In the hours after the explosion, the Showa crater continued to emit ash plumes in often near-continuous pulses, sometimes reaching several 100 m height, but with no visible incandescence or audible sounds.
Previous news
Eruption of Sakurajima just before midnight 20-21 July (local time)
Sunday, Jul 21, 2013
Sakurajima (Kyushu, Japan): (21 Jul) The volcano continues to produce relatively frequent and strong ash-rich explosions, but activity has decreased a bit compared to previous days. During last night, it had long-lasting (up to 1-2 hours) phases of continuous ash emissions of various intensity, with dense plumes up to about 500 m height, but completely silent and with no visible incandescence. During other phases, it was emitting a small plume of vapour with some dilute ash. ... [more]
Friday, Jul 19, 2013
Sakurajima (Kyushu, Japan): An ash plume at 20,000 ft (6 km) altitude was reported this morning at 03:08 GMT (12:08 local time). This would be the largest explosion of the volcano in at least 1 year. ... [more]
Map of recent earthquakes at Mt Churchill volcano in eastern Alaska
Churchill (United States, Eastern Alaska): A seismic swarm with magnitudes up to 3.5 has been occurring in the Wrangell Arc about 40 km NE of Mt. Churchill volcano during the past few days. The intensity and frequency of the quakes has calmed down yesterday. ... [more]
Current seismic recording from Veniaminof (VNHG station, AVO)
Thursday, Jul 18, 2013
Sakurajima (Kyushu, Japan): Activity has remained at very high levels, as if the volcano greets the scientific community arriving from all over the world for the 20-24 July IAVCEI conference. During yesterday and the day before, at least 14 explosions were recorded, many of which of moderate to large size with ash plumes up to 15,000 ft (4.5 km) altitude. ... [more]

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