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Diaporama
Actualités
jeudi, févr. 08, 2018
The alert level of the volcano was lowered back to green, as there has been declining seismic and infrasound activity over the past month. According to the Alaska Volcano Observatory, "these observations represent a return to normal background activity at Shishaldin." [details]
samedi, mars 12, 2016
The alert level was lowered back to normal status. Detectable activity (visible observations and satellite-based data) has been decreasing steadily of the past several months, the Alaska Volcano Observatory reported: ... [details]
 

Shishaldin volcan

Stratovolcano 2857 m / 9,373 ft
Aleutian Islands, Alaska, 54.76°N / -163.97°W
Condition actuelle: en vigilance - niveau agité (2 sur 5)
Shishaldin webcams / données en temps réel | Reports
Shishaldin livres
Last update: 8 févr. 2018
Style éruptif tipique: explosive
Eruptions du volcan Shishaldin: 2004 No recent earthquakes
HeureMag. / DepthDistanceLocation

Introduction:

The beautifully symmetrical volcano of Shishaldin is the highest and one of the most active volcanoes of the Aleutian Islands. The 2857-m-high, glacier-covered volcano is the westernmost of three large stratovolcanoes along an E-W line in the eastern half of Unimak Island. The Aleuts named the volcano Sisquk, meaning "mountain which points the way when I am lost." A steady steam plume rises from its small summit crater. Constructed atop an older glacially dissected volcano, Shishaldin is Holocene in age and largely basaltic in composition. Remnants of an older ancestral volcano are exposed on the west and NE sides at 1500-1800 m elevation. Shishaldin contains over two dozen pyroclastic cones on its NW flank, which is blanketed by massive aa lava flows. Frequent explosive activity, primarily consisting of strombolian ash eruptions from the small summit crater, but sometimes producing lava flows, has been recorded since the 18th century.
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Smithsonian / GVP volcano information

Shishaldin Photos:




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