Kupreanof

Photo of this volcano
  • United States
  • Alaska
  • Stratovolcano
  • 1987 CE
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 56.011°N
  • 159.797°W

  • 1895 m
    6216 ft

  • 312060
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

Most Recent Bulletin Report: March 1987 (SEAN 12:03) Citation IconCite this Report


Steam and ash emission from solfatara field

On 10 March at about 1200 MarkAir pilot Jerry Chisum observed ash and steam emission from a solfatara field on the SSW flank (at 56.00°N, 159.81°W). The steam dissipated within 2 km of the solfatara field, but a grayish-brown ash horizon extended about 15 km N at 1,800 m altitude. On 17, 22, and 26 March Chisum made close observations of the region and noted only normal steam emissions. No previous eruptions are known in historical time.

Information Contacts: J. Reeder, ADGGS.

The Global Volcanism Program has no Weekly Reports available for Kupreanof.

Bulletin Reports - Index


Reports are organized chronologically and indexed below by Month/Year (Publication Volume:Number), and include a one-line summary. Click on the index link or scroll down to read the reports.

03/1987 (SEAN 12:03) Steam and ash emission from solfatara field




Information is preliminary and subject to change. All times are local (unless otherwise noted)


March 1987 (SEAN 12:03) Citation IconCite this Report


Steam and ash emission from solfatara field

On 10 March at about 1200 MarkAir pilot Jerry Chisum observed ash and steam emission from a solfatara field on the SSW flank (at 56.00°N, 159.81°W). The steam dissipated within 2 km of the solfatara field, but a grayish-brown ash horizon extended about 15 km N at 1,800 m altitude. On 17, 22, and 26 March Chisum made close observations of the region and noted only normal steam emissions. No previous eruptions are known in historical time.

Information Contacts: J. Reeder, ADGGS.

Eruptive History


Summary of Holocene eruption dates and Volcanic Explosivity Indices (VEI).


Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1987 Mar 10 1987 Mar 10 Confirmed 1 Historical Observations SSW flank (1575 m)

The Global Volcanism Program has no synonyms or subfeatures listed for Kupreanof.

Photo Gallery


Steam plumes (center) rise from a prominent fumarole on the upper SSW flanks of Kupreanof volcano. The 1895-m-high stratovolcano is the largest and NE-most of a group of five relatively closely spaced Quaternary volcanic centers opposite Stepovak Bay. The only known historical activity from Kupreanof consisted of minor steam and ash emission that was reported from the SSW-flank solfatara field in 1987.

Photo by Tom Miller, 1973 (U.S. Geological Survey, Alaska Volcano Observatory).
See title for photo information.

Smithsonian Sample Collections Database


There are no samples for Kupreanof in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

Affiliated Sites