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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:
2018, 1987
Typical eruption style:
unspecified
Last earthquakes nearby
Latest satellite images

Sentinel hub | Landsat 8
 

Semisopochnoi volcano news & activity updates:

Semisopochnoi volcano (United States, Aleutian Islands) activity update: New eruption, minor ash emissions, new tephra cone

Wednesday Oct 03, 2018 02:56 AM | BY: MJFLEGEND

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.
Previous news
Tuesday, Jun 02, 2015
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) [more]
Current seismic signal at Semisopochnoi (AVO)
Thursday, Mar 26, 2015
The Alaska volcano observatory (AVO) detected significantly increased earthquake activity under the volcano and warns of a possible eruption: ... [more]
Current seismic activity (CEAP station / AVO)
Wednesday, Jul 23, 2014
Earthquakes have decreased but are still above background levels. No eruptive activity has been recorded. Alert level remains yellow. [more]
Tuesday, Jul 01, 2014
The earthquake swarm that began on June 9 continues. No sign of activity was noted in satellite images over the past 24 hours. (AVO) [more]
Current seismic activity (CEAP station / AVO)
Thursday, Jun 19, 2014
The earthquake swarm continues. No eruptive activity has been detected. [more]

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