Great Sitkin volcano (Aleutian Islands): new lava dome confirmed
Wed, 28 Jul 2021, 03:19 | BY: MARTIN
Degassing activity continues from the new lava dome at Great Sitkin volcano (image: AVO)
West flank of Great Sitkin volcano captured on 11 June with visible tephra deposits from the 25 May eruption (image: AVO)
The lava dome continues to accumulate in the inner summit crater with a current diameter of approx. 130 m. The lava dome-like feature was first seen to appear on 22 July.
The alert level for the volcano remains at "orange".
Source: Alaska Volcano Observatory volcano activity update 27 July 2021
- All news about: Great Sitkin volcano
- Information about: Great Sitkin volcano
Previous news
Sat, 24 Jul 2021, 05:39
Great Sitkin volcano (Aleutian Islands): Volcanic Alert Level raised to Orange
A satellite image from 22 July at 21:32 local time shows a small ~50 m (~150 ft) diameter area of uplift in the center of the crater at Great Sitkin suggestive of rising magma near the surface. The lava dome-like feature appears to have been emplaced sometime between July 14 and 22. ... Read all
Wed, 21 Jul 2021, 06:00
Great Sitkin volcano (Andreanof Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 21 July-27 July 2021 (New Activity / Unrest)
AVO reported that a satellite image of Great Sitkin acquired at 0932 on 22 July showed a small area of uplift, about 50 m in diameter, and elevated surface temperatures associated with the feature. These observations suggested magma rising near the surface, prompting AVO to raise the Aviation Color Code and the Volcano Alert Level to Orange and Watch, respectively. Small earthquakes were recorded during 23-25 July. ... Read all
Show more
