AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
About Alaska's Volcanoes | Hazards from Alaska's Volcanoes | Map & Alphabetical List | Interactive Map | Eruption Search | Volcano Search | Vsevidof 
You are here: Home > Volcano Information > Vsevidof

Mount Vsevidof description and information


Official Name: Mount Vsevidof
Most Recent Activity:March 11, 1957
Seismically Monitored: No
Elevation: 7051 ft (2149 m)
Latitude: 53.1256° N
Longitude:168.6937° W
CAVW Number:311270
Nearby towns:Nikolski 15 mi (24 km) SW
Unalaska 103 mi (165 km) NE
Akutan 139 mi (223 km) NE
Atka 239 mi (385 km) SW
Anchorage 894 mi (1438 km) NE
From Miller and others (1998) [1]: "Mount Vsevidof is a symmetrical stratovolcano near the southwest end of Umnak Island. It is about 10 km wide at the base and steepens from 15 degrees at 300 m altitude to about 30 degrees near the summit. A circular crater, 1.2 km in diameter, occupies the summit. Glacial ice fills the crater and extends down the north and east flanks of the cone; some of these glacial tongues have incised narrow canyons up to 120 m deep.

"A chain of small cinder cones (unit Qc) below altitude 1220 m parallels a rift on the western flank [2]. Young flows of andesite and dacite (unit Qvf) were extruded from this rift and from other vents on north and south flanks of the cone. Pyroclastic deposits, apparently products of a culminating summit eruption, attain a thickness of more than 30 m at the crater but thin downslope.

"The oldest Vsevidof flows (unit Qvba), are overlain by till of the last major glaciation, but the bulk of the cone is believed to be of post-glacial, i.e., Holocene, age. The cone is locally underlain by hypersthene-andesite lava flows and pyroclastic rocks of the more deeply eroded Mount Recheschnoi. Lava flows from both Recheschnoi and Vsevidof unconformably overlie a basement of probable early to middle Tertiary age including plutonic rocks (unit Tdp) and altered sedimentary and metamorphic rocks."

Catalog of the historically active volcanoes of Alaska, 1998
citation imageMiller, T. P., McGimsey, R. G., Richter, D. H., Riehle, J. R., Nye, C. J., Yount, M. E., and Dumoulin, J. A., 1998, Catalog of the historically active volcanoes of Alaska: U.S. Geological Survey Open-File Report 98-0582, 104 p.
Download PDF title page PDF : 52
Download PDF intro and TOC PDF : 268 KB
Download PDF eastern part - Wrangell to Ukinrek Maars PDF : 972 KB
Download PDF central part - Chiginagak to Cleveland PDF : 2,463 KB
Download PDF western part - Carlisle to Kiska PDF : 956 KB
Download PDF references PDF : 43 KB

Geology of Umnak and Bogoslof Islands, Aleutian Islands, Alaska, 1959
citation imageByers, F. M. Jr., 1959, Geology of Umnak and Bogoslof Islands, Aleutian Islands, Alaska: in Investigations of Alaskan volcanoes, U.S. Geological Survey Bulletin 1028-L, p. 267-369, 5 sheets, scale 1 at 1:63,360, 1 at 1:96,000, and 1 at 1:300,000.
Download PDF full-text PDF : 3.5 MB
Download PDF plate 39 PDF : 2.2 MB
Download PDF plate 40 PDF : 3.9 MB
Download PDF plate 41 PDF : 5.6 MB
Download PDF plate 48 PDF : 85 KB
Download PDF table 3 PDF : 149 KB

Contact AVO Privacy Accessibility Information Quality FOIA
URL: www.avo.alaska.edu/volcanoes/volcinfo.php
Page modified: September 29, 2020 12:19
Contact Information: AVO Web Team

twitter @alaska_avo
facebook alaska.avo
email Receive volcano updates by email: USGS VNS

This website is supported by the U.S. Geological Survey under Cooperative Agreement Grant G22AC00137

Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey.