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Bogoslof volcano (Aleutian Islands): new explosion underway with significant ash emission likely

Mon, 13 Feb 2017, 17:28 | BY: T
Seismic signal from Bogoslof volcano, MSW station (on Makushin 60 km to the east from Bogoslof)
Seismic signal from Bogoslof volcano, MSW station (on Makushin 60 km to the east from Bogoslof)
After a relatively long pause, a new explosion is now occurring at the volcano.
The Alaska Volcano Observatory (AVO) raised the Aviation Color Code back to RED, and wrote:
"A significant explosive eruption began at Bogoslof volcano at about 16:24 UTC on February 13 (07:24 AKST on February 13) as indicated in seismic data.
"Although at this time there has been no lightning detected, nor satellite images received to confirm eruptive activity, the intensity of seismicity strongly suggests that significant ash emissions have occurred." (AVO)

Previous news

Wed, 8 Feb 2017, 06:00

Bogoslof volcano (Fox Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 8 February-14 February 2017 (Continuing Activity)

AVO reported that during 8-12 and 14 February cloud cover prevented satellite views of Bogoslof; no other data indicated eruptive activity. At 0724 on 13 February seismicity significantly increased, prompting AVO to raise the Aviation Color Code (ACC) to Red and the Volcano Alert Level (VAL) to Warning. Satellite images acquired through 0930 showed no ash emissions above the 3 km (10,000 ft) a.s.l. cloud deck, and no lightning was detected. ... Read all
Sun, 5 Feb 2017, 16:18

Bogoslof volcano (Aleutian Islands): continuing intermittent explosions reshape island

Changes of Bogoslof Island during the recent series of explosions; The January 30-31, 2017 eruptive activity generated roughly 0.4 square kilometers of new land and as of January 31, 2017, the island area was 1.02 square kilometers, roughly three times the size of the pre-eruption island. Nearly all of this new material consists of unconsolidated pyroclastic fall and flow (surge) deposits that are highly susceptible to wave erosion and thus additional changes in the configuration of the island are likely. (image: Chris Waythomas / AVO)
The volcano continues to produce large explosions at intervals of 1-3 days. The latest eruption began at 01:41 UTC on February 4 (16:41, February 3 AKST) produced a small volcanic ash plume that was observed on satellite and moved towards the north over the Bering Sea at an altitude of less than 25,000 ft above sea level. ... Read all
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Bogoslof volcano
Submarine volcano 150 m / 492 ft
United States, Aleutian Islands, 53.93°N / -168.03°W
Current status: normal or dormant (1 out of 5) Bogoslof volcano eruptions:
2016-17, 1992, 1951 (?), 1931 (?), 1926-28, 1913, (?), 1909-10, 1908 (?), 1907, 1906, 1883, 1806, 1786
Typical eruption style
explosive