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Diaporama
Semisopochnoi volcan
Stratovolcano 1221 m / 4,006 ft
United States, Aleutian Islands, 51.93°N / 179.58°E
Condition actuelle: Activité petite ou avertissement éruption imminente (3 sur 5)
Semisopochnoi webcams / données en temps réel | Reports
Semisopochnoi livres
Eruptions du volcan Semisopochnoi:
1987 
Style éruptif tipique:
unspecified
Derniers séismes proches
Derniers images satellite

Sentinel hub | Landsat 8
 

Semisopochnoi volcano news & activity updates:

sam., 7 déc. 2019, 15:46
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: ...plus [lire toutes]
jeu., 21 nov. 2019, 22:42
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.
lun., 23 sept. 2019, 05:55
Seismicity at the volcano has decreased over the past few weeks with no observations of seismic tremor since September 15. ...plus
mer., 7 août 2019, 12:05
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. ...plus
sam., 6 juil. 2019, 08:26
Yesterday, the Alaska Volcano Observatory raised the alert level of the volcano due to an increase in seismicity above background levels. ...plus
jeu., 1 nov. 2018, 23:55
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.
mar., 30 oct. 2018, 11:32
Triple-coned Mount Cerberus; the location of the 2018 eruption, in the foreground, with long-quiet Anvil Peak in the background. Credit: Roger Clifford, via AVO.
The renewed eruption has continued in the last few days. Regular small explosions are occurring, but there have been no sightings of ash plumes.
AVO webicorder showing earthquakes and explosion signals over the last day.
ven., 26 oct. 2018, 18:45
Volcanic Ash Advisory Center Anchorage (VAAC) issued the following report: ...plus [lire toutes]
ven., 26 oct. 2018, 06:43
Seismic signal from Semisopochnoi volcano this morning, showing the eruption (image: AVO)
A small eruption occurred at the volcano this morning (21:00 pm local time) and was detected in seismic data. The Alaska Volcano Observatory (AVO) reports: ...plus [lire toutes]
ven., 26 oct. 2018, 05:45
Satellite image of Semisopochnoi volcano on 26 Oct 2018
Volcanic Ash Advisory Center Anchorage (VAAC) issued the following report: ...plus [lire toutes]

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