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News
Thursday, Feb 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." [more]
Saturday, Mar 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: ... [more]
 

Shishaldin volcano

Stratovolcano 2857 m / 9,373 ft
Aleutian Islands, Alaska, 54.76°N / -163.97°W
Current status: normal or dormant (1 out of 5)
Shishaldin webcams / live data | Reports
Shishaldin volcano books
Last update: 8 Feb 2018
Typical eruption style: explosive
Shishaldin volcano eruptions: 2014-15, 2008 (?), 2004, 2002, 2000, 1999, 1997, 1995, 1993, 1986-87, 1981 (?), 1979, 1978, 1976, 1975, 1967, 1963, 1955, 1953, 1951, 1948, 1946-47, 1932, 1929, 1928, 1927, 1925, 1922, 1912 (?), 1901, 1899 (?), 1898, 1897 (?), 1883, 1880-81, 1865 (?), 1842, 1838, 1830, 1927-29, 1826, 1825, 1824, 1790 (?), 1775-78
TimeMag. / DepthDistanceLocation
Thu, 16 May 2019
Thu, 16 May 17:18 UTCM 0.6 / 2.6 km15 km20km SSW of False Pass, Alaska (USA)
Wed, 15 May 2019
Wed, 15 May 22:13 UTCM 1.8 / 4.9 km17 km22km SSW of False Pass, Alaska (USA)
Wed, 15 May 21:43 UTCM 1.2 / 3.2 km16 km23km SSW of False Pass, Alaska (USA)
Thu, 25 Apr 2019
Thu, 25 Apr 23:05 UTCM 1.4 / 4 km17 km22km SSW of False Pass, Alaska (USA)
View all recent quakes

Background:

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

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