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Mount Vsevidof

Vsevidof

Stratovolcano · United States · 2160m

Mount Vsevidof is allocated on SW Umnak Island. The historically active volcano, seen here from the south, contains an E-W zone of scoria cones on the W flank that fed many lava flows, including a large flow that reached the west coast of the island and formed Cape Kigushimkada.
Mount Vsevidof is allocated on SW Umnak Island. The historically active volcano, seen here from the south, contains an E-W zone of scoria cones on the W flank that fed many lava flows, including a large flow that reached the west coast of the island and formed Cape Kigushimkada. · Photo: Photo by Chris Nye (Alaska Division of Geological & Geophysical Surveys). · Wikimedia Commons
Type
Stratovolcano
Country
United States
Region
North America Volcanic Regions / Aleutian Ridge Volcanic Arc
Elevation
2160m
Coordinates
53.126, -168.688
Last eruption
1878
Tectonic setting
Subduction zone / Intermediate crust (15-25 km)
Landform
Composite
Major rock type
Andesite / Basaltic Andesite
Geological summary

The symmetrical Vsevidof stratovolcano, near the SW end of Umnak Island, contains a 1.2-km-wide, ice-filled summit crater that is breached by glaciers on the E and N sides. An E-W-trending zone of scoria cones that extends down much of the W flank has been the source of recorded eruptions. Most of the cone was constructed during the Holocene. Andesitic and dacitic lava flows originated from vents on the N and S flanks, and on the W-flank rift. The largest lava flow traveled down the W flank to the coast, forming Cape Kigushimkada.

Eruption history

Summary (VEI over time)
Click a bar to see individual eruptions
1784~1801 · 2 eruptions · max VEI ?1801~1819 · 1 eruptions · max VEI 31819~1836 · 1 eruptions · max VEI ?1871~1888 · 2 eruptions · max VEI 21940~1957 · 1 eruptions · max VEI 217841819187119051940

Detailed timeline

  1. 1957VEI 2Geological estimate
    1957-03-11 – 1957-03-12
    West flank fissure
  2. 1880VEI ?Geological estimate
    1880 – Ongoing
  3. 1878VEI 2Observed
    1878 – Ongoing
    West flank fissure ?
  4. 1830VEI ?Observed
    1830 – Ongoing
    SW end of Umnak Island
  5. 1817VEI 3Observed
    1817 – Ongoing
  6. 1790VEI ?Geological estimate
    1790-05-30 – Ongoing
  7. 1784VEI ?Geological estimate
    1784 – Ongoing

External links

⚠ For reference only. Not for emergency response.