Korovin 1987/3
Start: March 4, 1987 [1]
Stop: March 18, 1987 [1]
Event Type: Explosive
Max VEI: 2 [2]
Description: From Smithsonian Institution (1987): "On 18 March at 1954 a NOAA 10 satellite image showed three distinct plumes, each 95 km long, drifting ENE. The estimated vent locations were: 52.38N, 174.15W (Korovin's summit); 52.31N, 174.24W; and 52.29N, 174.21W (5.5 km WSW and 6.5 km SW of Mt. Kliuchef, a cone on Korovin's S flank). More accurate locations will be determined by USGS Anchorage. Just before midnight on the same day US Navy pilot Jeffrey Sullivan observed a southward-drifting ash plume rising to at least 3,000 m altitude, lit by an orange 'flame' from Korovin. Smaller orange flickering 'flames' from two other vents at lower elevation were visible. Two of the vents were ~2 km apart and the third vent was ~10 km NE of the other two vents.
Earlier in the day (at 1300) Julie Dirks and other Atka residents noticed sulfur smells (~18 km from the volcano). Although the weather was clear Dirks did not notice any 'unusual' eruptive activity. On 19 March a SIGMET notice was issued to warn pilots of volcanic ash 185 km on either side of a line from 52N, 175W to 54N, 172W. The warning remained in effect until 0930. Pilots reported that the ash cloud reached 3,600 m."
Additional information from Reeder (1990, Kliuchef): "Lieutenant Jeffrey Sullivan flying his U.S. Navy P3 Electra from Dutch Harbor to Adak at a 8,200 m altitude, noted about 240 km E of Adak just before midnight on 18 March a large orange flame with smoke to the south that was determined from the satellite imagery to be from Korovin volcano. Then, about 5 minutes later, Jeffrey could see two more smaller orange flickering flames that were farther to the south and were at a lower elevation than the first flame. These lower and smaller two flames would have been the two Mount Kliuchef SW flank vents."
Earlier in the day (at 1300) Julie Dirks and other Atka residents noticed sulfur smells (~18 km from the volcano). Although the weather was clear Dirks did not notice any 'unusual' eruptive activity. On 19 March a SIGMET notice was issued to warn pilots of volcanic ash 185 km on either side of a line from 52N, 175W to 54N, 172W. The warning remained in effect until 0930. Pilots reported that the ash cloud reached 3,600 m."
Additional information from Reeder (1990, Kliuchef): "Lieutenant Jeffrey Sullivan flying his U.S. Navy P3 Electra from Dutch Harbor to Adak at a 8,200 m altitude, noted about 240 km E of Adak just before midnight on 18 March a large orange flame with smoke to the south that was determined from the satellite imagery to be from Korovin volcano. Then, about 5 minutes later, Jeffrey could see two more smaller orange flickering flames that were farther to the south and were at a lower elevation than the first flame. These lower and smaller two flames would have been the two Mount Kliuchef SW flank vents."
References Cited
[1] Atka, 1987
Smithsonian Institution, 1987, Atka: Scientific Event Alert Network Bulletin v. 12, n. 03, unpaged.[2] Volcanoes of the world [2nd edition], 1994
Simkin, Tom, and Siebert, Lee, 1994, Volcanoes of the world [2nd edition]: Tucson, Arizona, Geoscience Press, 349 p.[3] Korovin, 1990
Reeder, J. W., 1990, Korovin: in Annual report of the world volcanic eruptions in 1987, Bulletin of Volcanic Eruptions, v. 27, p. 38-39.[4] Kliuchef, 1990
Reeder, J. W., 1990, Kliuchef: in Annual report of the world volcanic eruptions in 1987, Bulletin of Volcanic Eruptions, v. 27, p. 39-40.Complete Eruption References
Atka, 1987
Smithsonian Institution, 1987, Atka: Scientific Event Alert Network Bulletin v. 12, n. 03, unpaged.
Catalog of the historically active volcanoes of Alaska, 1998
Miller, 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.
intro and TOC PDF 268 KB
references PDF 43 KB 
Volcanoes of the world [2nd edition], 1994
Simkin, Tom, and Siebert, Lee, 1994, Volcanoes of the world [2nd edition]: Tucson, Arizona, Geoscience Press, 349 p.
Hard Copy held by AVO at FBKS - CEC shelf
Korovin, 1990
Reeder, J. W., 1990, Korovin: in Annual report of the world volcanic eruptions in 1987, Bulletin of Volcanic Eruptions, v. 27, p. 38-39.
Hard Copy held by AVO at FBKS - CEC file cabinet
Kliuchef, 1990
Reeder, J. W., 1990, Kliuchef: in Annual report of the world volcanic eruptions in 1987, Bulletin of Volcanic Eruptions, v. 27, p. 39-40.
Hard Copy held by AVO at FBKS - CEC file cabinet