Akutan Hot Springs Valley Lahar
Start: 6000 yBP [1]
Event Type: Not an eruption
Description: From Waythomas and others (1998): "A slightly clay-rich lahar in Hot Springs Valley (fig. 3 [in original text]) probably formed from a minor collapse of the volcano flank, perhaps in the area of an active fumarole field in the upper part of the valley. No obvious scarp is present. Although not exposed at the coast, this lahar probably reached Hot Springs Bay about 6000 years ago."
From Waythomas (1999): "A cohesive lahar in Hot Springs valley formed from a minor flank collapse of water-saturated, altered rock debris, probably in the area of an active fumarole field in the upper part of the valley. No obvious scarp is present. Although not exposed at the coast, this lahar probably reached Hot Springs Bay approximately 6000 years B.P. Because the lahar deposits in Hot Springs Bay valley originated from a localized slope failure, they are not likely related to any eruption of Akutan Volcano."
From Waythomas (1999): "A cohesive lahar in Hot Springs valley formed from a minor flank collapse of water-saturated, altered rock debris, probably in the area of an active fumarole field in the upper part of the valley. No obvious scarp is present. Although not exposed at the coast, this lahar probably reached Hot Springs Bay approximately 6000 years B.P. Because the lahar deposits in Hot Springs Bay valley originated from a localized slope failure, they are not likely related to any eruption of Akutan Volcano."
References Cited
[1] Stratigraphic framework of Holocene volcaniclastic deposits, Akutan Volcano, east-central Aleutian Islands, Alaska, 1999
Waythomas, C. F., 1999, Stratigraphic framework of Holocene volcaniclastic deposits, Akutan Volcano, east-central Aleutian Islands, Alaska: Bulletin of Volcanology, v. 61, n. 3, p. 141-161.[2] Preliminary volcano-hazard assessment for Akutan Volcano east-central Aleutian Islands, Alaska, 1998
Waythomas, C. F., Power, J. A., Richter, D. H., and McGimsey, R. G., 1998, Preliminary volcano-hazard assessment for Akutan Volcano east-central Aleutian Islands, Alaska: U.S. Geological Survey Open-File Report 98-0360, 36 p., 1 plate, scale unknown.
full-text PDF 1.68 MB
map sheet plate (PDF) 2.62 MB Complete Eruption References
Stratigraphic framework of Holocene volcaniclastic deposits, Akutan Volcano, east-central Aleutian Islands, Alaska, 1999
Waythomas, C. F., 1999, Stratigraphic framework of Holocene volcaniclastic deposits, Akutan Volcano, east-central Aleutian Islands, Alaska: Bulletin of Volcanology, v. 61, n. 3, p. 141-161.
Preliminary volcano-hazard assessment for Akutan Volcano east-central Aleutian Islands, Alaska, 1998
Waythomas, C. F., Power, J. A., Richter, D. H., and McGimsey, R. G., 1998, Preliminary volcano-hazard assessment for Akutan Volcano east-central Aleutian Islands, Alaska: U.S. Geological Survey Open-File Report 98-0360, 36 p., 1 plate, scale unknown.
full-text PDF 1.68 MB
map sheet plate (PDF) 2.62 MB 