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Report on Additional Reports (Unknown) — April 1986

Additional Reports

Scientific Event Alert Network Bulletin, vol. 11, no. 4 (April 1986)
Managing Editor: Lindsay McClelland.

Additional Reports (Unknown) United States: Possible eruption cloud in the Aleutian Islands seen on satellite imagery

Please cite this report as:

Global Volcanism Program, 1986. Report on Additional Reports (Unknown) (McClelland, L., ed.). Scientific Event Alert Network Bulletin, 11:4. Smithsonian Institution. https://doi.org/10.5479/si.GVP.SEAN198604-600500

Additional Reports


Lat Unknown, Unknown; summit elev. m

All times are local (unless otherwise noted)

Polar orbiting weather satellite imagery on 8 May at 0617 showed a distinct very bright plume along the Aleutian chain at 175-180°E. The plume appeared to be below high weather clouds (probably cirrus) and trended in a different direction, moving W to E and fanning out at its distal end. USGS personnel had received no reports of volcanic activity from airplane pilots or other observers. Several volcanoes with historical eruptions are located at the remote W end of the Aleutian Islands, but heavy weather clouds precluded a precise location for the plume's source area.

Geological Summary. Reports of floating pumice from an unknown source, hydroacoustic signals, or possible eruption plumes seen in satellite imagery.

Information Contacts: W. Gould, NOAA/NESDIS; M.E. Yount, USGS Branch of Alaskan Geology, Anchorage.