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Low-level steam and ash emissions continue at Kanaga Volcano
in the Aleutian Islands. Early in the week U.S. Navy and U.S. Fish and Wildlife personnel in Adak observed steam clouds from the summit crater rising to an altitude estimated to be about 6000-8000 ft. They also observed a dark stripe that extended from near the summit down the southeast flank. The absence of steaming associated with it suggests that it is probably either a small mudflow or ash concentration due to snowmelt.
AVO personnel aboard a fixed-wing aircraft observed the ongoing eruptive activity at Veniaminof this week. Lava flow extruded from a vent on the southeastern flank of the intracaldera stratocone had accumulated into a pile on the lower flank that extended to the base of the cone where it was in contact with glacial ice of the caldera floor. Concentric cracks in the glacial ice extended radially from the contact with the lava flow. No ponded water was observed and the area of glacial ice affected by interaction with the lava flow appeared to be less extensive than that from the 1983-84 eruption. An incandescent lava flow was visible high on the shoulder of the new lava pile. Vigorous steam emission was occurring from one or more points near the margin of the lava pile.
COOK INLET VOLCANOES
Seismicity at Spurr, Augustine, Redoubt and Iliamna
volcanoes remains at normal levels.
The Alaska Volcano Observatory continues to seismically
monitor Spurr, Augustine, Redoubt and Iliamna volcanoes. We maintain a computerized alarm system that is capable of
notifying AVO seismologists during non business hours should unusual seismic activity occur.