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U.S. Fish and Wildlife personnel aboard the RV Tiglax observed continuing eruptive activity at Kanaga Volcano during the early morning hours (0145 - 0245 local time) of June 20. From their vantage several hundred meters off the northwest shoreline of Kanaga Island, the crew observed two distinct "streams" of incandescent material cascading down the northwest flank. The crew was unsure whether or not any debris had reached the ocean. The upper flanks and summit of the volcano were obscured by steam and the exact origin of the incandescent streams could not be determined. Analysis of satellite images from near the time of the Tiglax crew observations was hampered by cloud cover.
On June 21, AVO observers noted a broad, black swath of material extending from a few hundred meters either side of the summit well down the northeast flank of Mount Cleveland. A vigorous white steam plume was being driven by wind down the east-southeast flank. The debris is presumed to be ash from the small May 21 eruption. USFWS personnel aboard the RV Tiglax had observed the black swath earlier in the week.
low clouds in Port Heiden prevented any observation of
Veniaminof this week. No pilot reports of continuing
activity were logged by FAA. A "warm" spot on AVHRR satellite images of Veniaminof persisted throughout this past week.
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.