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Great Sitkin volcano
Stratovolcano 1740+ m / 5,709 ft
United States, Aleutian Islands, 52.08°N / -176.13°W
Current status: restless (2 out of 5)
Great Sitkin webcams / live data | Reports
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Great Sitkin volcano eruptions:
1974 
Typical eruption style:
unspecified
Last earthquakes nearby
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Sentinel hub | Landsat 8
 

Great Sitkin volcano news & activity updates:

Great Sitkin volcano (Aleutian Islands, Alaska) activity update: relatively large earthquake detected

Monday Mar 09, 2020 08:01 AM | BY: MARTIN

Great Sitkin volcano from satellite (image: Sentinel 2)
Great Sitkin volcano from satellite (image: Sentinel 2)
The Alaska Volcano Observatory (AVO) recorded on 6 March at 06:31 local time relatively large earthquake with magnitude M 3.5. It was located approx. 1 km east-southeast of the summit at shallow depths (not more than 2 km below sea level). Since the quake, seismic activity has returned to lower levels, and no eruptive activity has been detected in infrasound or satellite data today. Although this earthquake represents a significant increase in the seismic activity at the volcano, it does not mean that an eruption is imminent. AVO is closely monitoring the volcano for other signs of unrest that may indicate increased activity or likelihood of an eruption.
Source: Alaska Volcano Observatory volcano activity update 9 March 2020
Previous news
Wednesday, Feb 26, 2020
Over the past month, earthquake activity has increased at Great Sitkin Volcano and is now above background levels. ... [more]
Monday, Jun 03, 2019
A small steam explosion occurred at the volcano yesterday morning (21:40 AKDT on 1 June local time), detected in local seismic data, the Alaska Volcano Observatory (AVO) reported. ... [more]
Friday, Jan 19, 2018
The recent unrest at the volcano, likely caused by a small intrusion of magma, has ended and the alert level was lowered to Green, the Alaska Volcano Observatory (AVO) reported earlier. ... [more]
Worldview-3 satellite image of the summit area of Great Sitkin volcano, November 21, 2017. The area of steaming indicated by the red arrow is the likely source of the volcanic emissions noted and photographed by local observers on Adak, November 19, 2017. The melt depressions on the east side of the 1974 lava flow were evident in a September 14, 2017 satellite image but not present in an April 18, 2017 image indicating that they likely formed during the spring-summer 2017. (image: Chris Waythomas / AVO / USGS)
Tuesday, Nov 28, 2017
Recent observations of a robust steam plume and a period of gradually increasing seismicity over several months at Great Sitkin prompted AVO to raise the Aviation Color Code to Yellow and the Volcano Alert Level to Advisory on 22 November. ... [more]
Friday, Nov 24, 2017
An increase in seismic activity and degassing prompted the Alaska Volcano Observatory (AVO) to raise the alert level of the volcano to yellow today: ... [more]

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