Stepovak Bay 3

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  • United States
  • Alaska
  • Cinder cone
  • Unknown - Uncertain Evidence
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 55.929°N
  • 160.002°W

  • 1555 m
    5100 ft

  • 312052
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Stepovak Bay 3.

The Global Volcanism Program has no Weekly Reports available for Stepovak Bay 3.

The Global Volcanism Program has no Bulletin Reports available for Stepovak Bay 3.

A group of four late-Pleistocene to Holocene volcanoes is located along a NE-trending line SW of Kupreanof volcano. Stepovak Bay 3 cinder cone, located 3.5 km to the NE of Stepovak 2 cone, has a thick Holocene lava flow that originated from an indistinct, ice-filled 300-m-wide crater and entered the same valley as the lava flow from Stepovak Bay 2 (Wilson, 1989). Elsewhere (in Wood and Kienle, 1990), Wilson noted uncertainty about Holocene activity from Stepovak Bay 3.

The Global Volcanism Program is not aware of any Holocene eruptions from Stepovak Bay 3. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Stepovak Bay 3 page in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).

The Global Volcanism Program has no synonyms or subfeatures listed for Stepovak Bay 3.

A group of four small late-Pleistocene to Holocene volcanoes referred to as Stepovak Bay 1 through 4 lies along the NE-trending snow-covered ridge extending from the top center to the lower left. The chain of volcanoes lies NW of Stepovak Bay (lower right); individual centers are not distinguishable because of the extensive snow cover in this NASA Landsat image (with north to the top). The larger Kupreanof stratovolcano lies out of view at the upper right.

NASA Landsat7 image (worldwind.arc.nasa.gov).
A group of four small late-Pleistocene to Holocene volcanoes referred to as Stepovak Bay 1 through 4 lies along the NE-trending snow-covered ridge extending from the top center to the lower left. The chain of volcanoes lies NW of Stepovak Bay (lower right); individual centers are not distinguishable because of the extensive snow cover in this NASA Landsat image (with north to the top). The larger Kupreanof stratovolcano lies out of view at the upper right.

NASA Landsat7 image (worldwind.arc.nasa.gov).

The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title.

Alaska Volcano Observatory, 2005-. Volcanoes. http://www.avo.alaska.edu/volcanoes.php.

Wilson F H, 1989. Geologic setting, petrology, and age of Pliocene to Holocene volcanoes of the Stepovak Bay Area, Western Alaska Peninsula. U S Geol Surv Bull, 1903: 84-95.

Wood C A, Kienle J (eds), 1990. Volcanoes of North America. Cambridge, England: Cambridge Univ Press, 354 p.

Yount M E, Wilson F H, Miller J W, 1985. Newly discovered Holocene volcanic vents, Port Moller and Stepovak Bay quadrangles. In: Bartsch-Winkler S, Reed K M (eds), The United States Geological Survey in Alaska: Accomplishments in 1983, {U S Geol Surv Circ}, 945: 60-62.

Volcano Types

Cinder cone

Tectonic Setting

Subduction zone
Continental crust (> 25 km)

Rock Types

Major
Andesite / Basaltic Andesite
Basalt / Picro-Basalt

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
0
0
0
1,831

Affiliated Databases

Large Eruptions of Stepovak Bay 3 Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
WOVOdat WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore.
EarthChem EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS).
Smithsonian Collections Search the Smithsonian's NMNH Department of Mineral Sciences collections database. Go to the "Search Rocks and Ores" tab and use the Volcano Name drop-down to find samples.