Bogoslof volcano (Aleutian Islands): larger explosive eruption on 10 June, ash to 34,000 ft

An explosive eruption occurred from about 3:18 to 5:28 local time AKDT (11:18 to 13:28 UTC) on 10 June. This sequence began with a series of short infrasound signals and then, starting at about 4:16 AKDT (12:16 UTC), transitioned into several minutes-long continuous seismic and infrasound tremor signals.
Satellite images of the resulting cloud show it reached as high as 34,000 ft asl and drifted to the northwest. Satellite data also indicate that at least part of the volcanic cloud was more ash-rich than most of those seen previously in the Bogoslof eruptive sequence to date. This suggests that the eruption may have destroyed the lava dome that was emplaced earlier this week.
Since 5:28 AKDT (13:28 UTC), seismicity as detected on neighboring islands has been quiet, no lightning has been detected, and satellite images show no additional emission from the volcano.
Bogoslof volcano remains at a heightened state of unrest and in an unpredictable condition. Additional explosions producing high-altitude volcanic clouds could occur at any time. Low-level explosive activity that is below our ability to detect in our data sources may be occurring. These low-level explosions could pose a hazard in the immediate vicinity of the volcano.
(AVO)