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Data from the Global Volcanism Program of the Smithsonian Institution
Details for: Little Sitkin
Little Sitkin is seen here on the NW of the island and the peak to the left is part of the Williwaw Cove Formation, consisting of Tertiary to Quaternary lava flows. Two nested calderas lie between this peak and Little Sitkin. An older Pleistocene caldera lies just beyond the cloud in the center. Photo by Steve Ebbert, 2000 (U.S. Fish and Wildlife Service).
Volcano Number:
311050
Volcano Name:
Little Sitkin
Country:
United States
Volcano Type:
Stratovolcano
Last Eruption:
1830 CE
Elevation:
1174m
Tectonic Setting:
Subduction zone / Intermediate crust (15-25 km)
Latitude:
51.95
Longitude:
178.543
Details
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Diamond-shaped Little Sitkin Island is bounded by steep cliffs on the east, north, and NE sides. Little Sitkin volcano contains two nested calderas. The older, nearly circular Pleistocene caldera is 4.8 km wide, may have once contained a caldera lake, and was partially filled by a younger cone formed mostly of andesitic and dacitic lava flows. The elliptical younger caldera is 2.7 x 4 km wide; it lies within the eastern part of the older caldera and shares its eastern and southern rim. The younger caldera partially destroyed the lava cone within the first caldera and is of possible early Holocene age. Young-looking dacitic lava flows, erupted in 1828 (Kay, in Wood and Kienle 1990), issued from the central cone within the younger caldera and from a vent on the west flank outside the older caldera. Fumarolic areas are found near the western coast, along the NW margin of the older caldera, and from the summit crater down the southern flank for a 1 km distance.
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Eruption Data from the Global Volcanism Program of the Smithsonian Institution
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Emissions Data from the Global Volcanism Program of the Smithsonian Institution
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Data from the Earthchem Library
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Data from the Earthchem Portal
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Data from the SESAR Database
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Data from the MaGa Database
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Data from UNAVCO
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Data from USIEI
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Data from IRIS FDSNWS
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