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Semisopochnoi volcano
Stratovolcano 1221 m / 4,006 ft
United States, Aleutian Islands, 51.93°N / 179.58°E
Current status: restless (2 out of 5)
Semisopochnoi webcams / live data | Reports
Semisopochnoi volcano books
Semisopochnoi volcano eruptions:
1987
Typical eruption style:
unspecified
Last earthquakes nearby
Latest satellite images
 

Semisopochnoi volcano news & activity updates:

Fri, 12 Oct 2018, 21:24
AVO has lowered the Aviation Color Code and Alert Level to YELLOW/ADVISORY due to satellite observations and a lack of tremor lately indicating that eruptive activity has stopped. Elevated seismicity continues.
Wed, 3 Oct 2018, 02:56
On September 16, AVO raised the volcano to Aviation Color Code YELLOW and Volcanic Alert Level ADVISORY due to increased seismicity. The following day, activity increased further, with bursts of tremor; AVO raised the Aviation Color Code to ORANGE and Volcanic Alert Level to WATCH. Subsequent satellite imagery showed ash deposits and a new tephra cone on the northern cone of Mount Cerberus, one of the cones of the volcanic system. No significant emissions have been detected.
Tue, 2 Jun 2015, 11:05
A decline in seismicity over the last few months and no sign of activity in daily satellite images prompts AVO to downgrade Semisopochnoi volcano from Aviation Color Code YELLOW and Volcanic Alert Level ADVISORY to UNASSIGNED. (USGS)
Thu, 26 Mar 2015, 18:03
Current seismic signal at Semisopochnoi (AVO)
The Alaska volcano observatory (AVO) detected significantly increased earthquake activity under the volcano and warns of a possible eruption: ...more
Wed, 23 Jul 2014, 13:44
Current seismic activity (CEAP station / AVO)
Earthquakes have decreased but are still above background levels. No eruptive activity has been recorded. Alert level remains yellow.
Tue, 1 Jul 2014, 15:15
The earthquake swarm that began on June 9 continues. No sign of activity was noted in satellite images over the past 24 hours. (AVO)
Thu, 19 Jun 2014, 15:19
Current seismic activity (CEAP station / AVO)
The earthquake swarm continues. No eruptive activity has been detected.
Mon, 16 Jun 2014, 11:17
Current seismic activity (CEAP station / AVO)
The earthquake swarm at the volcano that started on June 9 and escalated on June 12 continues. No eruptive activity is currently indicated and nothing was observed in cloudy satellite images over the past day. (AVO)
Fri, 13 Jun 2014, 20:56
Current seismic signal at Semisopochnoi volcano (CEAP station / AVO)
Another remote volcano in Alaska is showing signs of unrest or possible activity. The Alaska Volcano Observatory (AVO) sent out the following alert: ...more [read all]

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