Kupreanof

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  • 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) Cite 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) Cite 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.

Basic Data

Volcano Number

Last Known Eruption

Elevation

Latitude
Longitude
312060

1987 CE

1895 m / 6216 ft

56.011°N
159.797°W

Volcano Types

Stratovolcano

Rock Types

Major
Andesite / Basaltic Andesite
Basalt / Picro-Basalt

Tectonic Setting

Subduction zone
Continental crust (> 25 km)

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
0
0
11
969

Geological Summary

Kupreanof is the largest and NE-most of a group of five relatively closely spaced Quaternary volcanic centers opposite Stepovak Bay. A debris flow or block-and-ash flow with possible juvenile fragments descended a late-Pleistocene valley south of the volcano. The 1895-m-high stratovolcano displays vigorous fumarolic activity. Its only known historical activity consisted of minor steam and ash emission that was reported from a SSW-flank solfatara field in 1987.

References

The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography.

Miller T P, 1979. (pers. comm.).

Motyka R J, Liss S A, Nye C J, Moorman M A, 1993. Geothermal resources of the Aleutian arc. Alaska Div Geol Geophys Surv, Prof Rpt, no 114, 17 p and 4 map sheets.

Smithsonian Institution-SEAN, 1975-89. [Monthly event reports]. Bull Scientific Event Alert Network (SEAN), v 1-14.

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.

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).

Smithsonian Sample Collections Database


A listing of samples from the Smithsonian collections will be available soon.

Affiliated Sites

Large Eruptions of Kupreanof 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).
MODVOLC - HIGP MODIS Thermal Alert System Using infrared satellite Moderate Resolution Imaging Spectroradiometer (MODIS) data, scientists at the Hawai'i Institute of Geophysics and Planetology, University of Hawai'i, developed an automated system called MODVOLC to map thermal hot-spots in near real time. For each MODIS image, the algorithm automatically scans each 1 km pixel within it to check for high-temperature hot-spots. When one is found the date, time, location, and intensity are recorded. MODIS looks at every square km of the Earth every 48 hours, once during the day and once during the night, and the presence of two MODIS sensors in space allows at least four hot-spot observations every two days. Each day updated global maps are compiled to display the locations of all hot spots detected in the previous 24 hours. There is a drop-down list with volcano names which allow users to 'zoom-in' and examine the distribution of hot-spots at a variety of spatial scales.
MIROVA Middle InfraRed Observation of Volcanic Activity (MIROVA) is a near real time volcanic hot-spot detection system based on the analysis of MODIS (Moderate Resolution Imaging Spectroradiometer) data. In particular, MIROVA uses the Middle InfraRed Radiation (MIR), measured over target volcanoes, in order to detect, locate and measure the heat radiation sourced from volcanic activity.