Get our newsletter!
Check out our volcano tours on VolcanoAdventures.com!
Volcanoes & Earthquakes - new app for Android
Volcanoes & Earthquakes - app for iPhone & iPad

Guaranteed tours:
14-27 Mar 2020: Desert, salt and volcanoes - Danakil desert (Ethiopia)
21-28 Mar 2020: Land of Theseus - Saronic Gulf (Greece)
28 Mar - 4 Apr 2020: Land of Theseus - Saronic Gulf (Greece)
11-19 Apr 2020: From Stromboli to Etna - Eolian Islands + Etna volcano (Italy)
4-8 May 2020: Krakatau Volcano Special - Krakatau volcano (Indonesia)
9-17 May 2020: From Stromboli to Etna - Eolian Islands + Etna volcano (Italy)
2-18 Jul 2020: Volcanoes of Java - Java (Indonesia)
11-29 Aug 2020: Kamchatka - Land of Colors - Kamchatka (Russia)
21-31 Aug 2020: Islands of Fire and Whales - Kurile Islands (Russia)
: spaces available / : guaranteed / : few spaces left / : booked out
Random pictures
Semisopochnoi volcano
Stratovolcano 1221 m / 4,006 ft
United States, Aleutian Islands, 51.93°N / 179.58°E
Current status: minor activity or eruption warning (3 out of 5)
Semisopochnoi webcams / live data | Reports
Semisopochnoi volcano books
Semisopochnoi volcano eruptions:
2019, 2018, 1987
Typical eruption style:
unspecified
Last earthquakes nearby
Latest satellite images

Sentinel hub | Landsat 8
 

Semisopochnoi volcano news & activity updates:

Semisopochnoi volcano (Alaska): new eruption, alert level raised to orange

Saturday Dec 07, 2019 15:46 PM | BY: T

Seismic signal from Semisopochnoi volcano as recorded on Adak Island (image: AVO)
Seismic signal from Semisopochnoi volcano as recorded on Adak Island (image: AVO)
An eruption is probably occurring at the volcano. The Alaska Volcano Observatory (AVO) detected seismic signals of strong volcanic tremor, probably corresponding to the arrival of magma in the summit vent, but the nature of the eruption itself is unclear:
"The event started at 00:26 AKST / 09:26 UTC and has continued with and ongoing but weaker local seismic signal. Any volcanic ash emissions are most likely low-level.
The meteorological cloud deck has been around 10,000' (3000 m) asl over Semisopochnoi and no ash signals have been detected above this height. Nothing has been detected in lightning data." (AVO)
Previous news
Thursday, Nov 21, 2019
The U.S. Geological Survey Alaska Volcano Observatory (AVO) noted that weak seismicity levels continue. No eruptive activity has been detected by regional infrasound data, and no anomalous activity was observed in cloudy satellite data over the past day. [more]
Monday, Sep 23, 2019
Seismicity at the volcano has decreased over the past few weeks with no observations of seismic tremor since September 15. ... [more]
Wednesday, Aug 07, 2019
AVO reported that during 31 July-6 August seismicity at the volcano remained elevated and was characterized by periods of weak, continuous tremor and discrete low-frequency earthquakes. Satellite images were mostly cloudy, though a possible steam plume was visible during 5-6 August. ... [more]
Saturday, Jul 06, 2019
Yesterday, the Alaska Volcano Observatory raised the alert level of the volcano due to an increase in seismicity above background levels. ... [more]
Thursday, Nov 01, 2018
AVO reports that there have been no explosions in the last day, and only two the day before. The volcano remains highly restless and explosions could resume. [more]
 

More on VolcanoDiscovery:

Copyrights: VolcanoDiscovery and other sources as noted.
Use of material: Most texts and images, in particular photographs, on this website are protected by copyright. Further reproduction and use of without authorization is usually not consented. If you are not sure or need licensing rights for photographs, for example for publications and commercial use, please contact us.
Home | Travel | Destinations | Volcanoes | Photos | Earthquakes | About | Glossary | News | Contact | Privacy | Imprint || Français | Deutsch
Follow us: