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Bogoslof vulkaan
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 webcams / Live-gegevens | Reports
Bogoslof vulkaan boeken
Bogoslof vulkaanuitbarstingen:
2016-17, 1992, 1951 (?), 1931 (?), 1926-28, 1913, (?), 1909-10, 1908 (?), 1907, 1906, 1883, 1806, 1786
Typical eruption style:
explosive
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Bogoslof volcano news & activity updates:

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

Sunday Feb 05, 2017 16:18 PM | DOOR: T

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)
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)
Satellite image of Bogoslof volcano on 31 Jan 2017 (image: AVO)
Satellite image of Bogoslof volcano on 31 Jan 2017 (image: AVO)
Ash fall on 31 Jan in Unalaska (image: Andy Dietrick / AVO)
Ash fall on 31 Jan in Unalaska (image: Andy Dietrick / 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.
This makes the list of recent significant explosive phases at the volcano during the past 2 weeks to be 20, 22, 24, 26, 27, 31 Jan, 3 and 4 Feb. The Aviation Color Code has been swinging between RED and ORANGE in tandem with the explosive activity.
Depending on wind direction, the larger eruptions have been causing light to moderate ash falls in the city of Unalaska 98 km to the southeast from Bogoslof.
Island changes shape:
As local result of the repeated explosions, the small island's morphology is quickly changing: the vast bay enclosing the vent area, photographed on January 10, is now closed and contains a lake. A second, smaller lake is located in another crater just east of the first one. With the isolation of the crater from sea water access, the explosivity of the eruptions should gradually decline as less water reaches the erupting magma. In that case, a cinder cone could be built and or lava flows are likely make their appearance.
Vorig nieuws
Friday, Jan 27, 2017
Another explosive phase has started at the volcano a short time ago, from 08:24 AKST local time (17:24 UTC). The Alaska Volcano Observatory detected increased seismic activity and lightnings in the area, typical for large explosions. ... [meer...]

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