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Zufallsfotos
Bogoslof Vulkan
Submarine volcano 150 m / 492 ft
United States, Aleutian Islands, 53.93°N / -168.03°W
Aktueller Status: normal / ruhend (1 von 5)
Bogoslof Webcams / aktuelle Daten | Berichte
Bogoslof Vulkan-B cher
Ausbrüche des Bogoslof:
1992 
Typische Aktivität:
explosive
Letzte Erdbeben in der Nähe
Letzte Satellitenbilder

Sentinel hub | Landsat 8
 

Bogoslof volcano news & activity updates:

Bogoslof volcano (Aleutian Islands): no new ash emissions, dramatic changes to the island from Wednesday's explosion

Freitag Dez 23, 2016 13:59 | VON: T

Analysis of shoreline change and vent location from the eruption of Bogoslof volcano. The base image was collected on March 19, 2015 and the analysis was conducted on data from December 22, 2016 after the large explosive eruption on December 21, 2016. Note that the location of the vent for the eruption was underwater or near the shoreline on the NE part of Bogoslof Island. Deposits have enlarged portions of the island and are interpreted to be comprised of coarse-grained volcanic ash and blocks of lava. (image: Burton, Bill; Schneider, Dave / AVO / USGS)
Analysis of shoreline change and vent location from the eruption of Bogoslof volcano. The base image was collected on March 19, 2015 and the analysis was conducted on data from December 22, 2016 after the large explosive eruption on December 21, 2016. Note that the location of the vent for the eruption was underwater or near the shoreline on the NE part of Bogoslof Island. Deposits have enlarged portions of the island and are interpreted to be comprised of coarse-grained volcanic ash and blocks of lava. (image: Burton, Bill; Schneider, Dave / AVO / USGS)
No more ash emissions have been detected from the volcano after the violent explosion Wednesday afternoon (16:10 AKST 21 Dec = 01:10 UTC 22 Dec). However, at least minor intermittent volcanic activity seems to have occurred after this powerful explosion as well.
Alaska Volcano Observatory (AVO) reported that seismicity had abruptly declined to low levels following the eruption. AVO lowered the alert level to orange in the evening.
The next morning (yesterday 22 Dec 01:20 local time), tremor (inferred from seismic recordings on neighboring islands) climbed again to high levels, probably due to volcanic surface activity, but no ash emissions could be identified in satellite images.
The seismic activity began to decline yesterday afternoon again and has remained low with no other indications of new activity so far.

Changes on the island:
AVO published the attached amazing image, showing that Wednesday's eruption came from an at least partially submerged vent and had a major impact on the morphology of the island itself:
"... a new, small island has formed just offshore of the northeast end of the main island. The former shore and much of the northeast side of Bogoslof Island adjacent to this island has been largely removed, and deposition of material has occurred on the west side of the island. The excavated area of the former northeast shore is likely the vent for this recent eruption, which appears to be just below sea level."
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Vorherige Nachrichten
Donnerstag, Dez 22, 2016
Volcanic Ash Advisory Center Anchorage (VAAC) issued the following report: ... [mehr]
Ash plume from Bogoslof volcano this morning (Himawari 8, NOAA/CIMSS)
Donnerstag, Dez 22, 2016
Another powerful explosion occurred at the volcano last night at 17:20 local time (01:20 UTC this morning). The second eruption was much stronger and richer in ash than the first one detected the night before. ... [mehr]
Donnerstag, Dez 22, 2016
Volcanic Ash Advisory Center Anchorage (VAAC) issued the following report: ... [mehr]
Ash plume from Bogoslof volcano on satellite imagery (image: NOAA/CIMSS)
Mittwoch, Dez 21, 2016
An eruption occurred at the volcano early this morning (at 01 am UTC). A brief, but relatively strong explosion seems to have produced a short-lived ash plume which was spotted on satellite data and by pilots en route in the area. ... [mehr]
Mittwoch, Dez 21, 2016
Volcanic Ash Advisory Center Anchorage (VAAC) issued the following report: ... [mehr]

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