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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
Great Sitkin volcano books
Great Sitkin volcano eruptions:
1974 
Typical eruption style:
unspecified
Last earthquakes nearby
Latest satellite images

Sentinel hub | Landsat 8
 

Great Sitkin volcano news & activity updates:

Thu, 30 Jul 2020, 21:35
The Alaskan Volcano Observatory (AVO) report low-level unrest at Great Sitkin continues. Occasional small local earthquakes have occurred at the volcano over the past day. No explosive activity was detected by infrasound sensors. No activity was observed in cloudy satellite and web camera imagery.
Wed, 15 Jul 2020, 10:57
Today at 08:59 local time Alaska Volcano Observatory (AVO) recorded tectonic earthquake with magnitude M 5.3 at 8.5 km depth about 55 miles (90 km) west-northwest of Great Sitkin volcano. ...more read all
Fri, 20 Mar 2020, 05:19
AVO report that small local earthquakes continued over the past day beneath Great Sitkin volcano. No significant activity was observed in cloudy satellite and clear web camera images.
Mon, 9 Mar 2020, 08:01
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. ...more
Wed, 26 Feb 2020, 22:37
Over the past month, earthquake activity has increased at Great Sitkin Volcano and is now above background levels. ...more
Mon, 3 Jun 2019, 08:23
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
Fri, 19 Jan 2018, 07:01
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 read all
Tue, 28 Nov 2017, 12:05
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)
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 read all
Fri, 24 Nov 2017, 07:29
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 read all
Sat, 22 Jul 2017, 12:05
An increase in seismic activity was detected at Great Sitkin starting with seismic tremor on July 21 16:17 AKDT (July 22 00:17 UTC). After about an hour, tremor transitioned to discrete earthquakes. ...more

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