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AVO Archived Volcano Activity Notifications

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ARCHIVED REPORT
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KANAGA VOLCANO



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.



MOUNT CLEVELAND



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.



VENIAMINOF



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.





VOLCANO ALERT LEVELS
NORMAL
Volcano is in typical background, noneruptive state or, after a change from a higher level, volcanic activity has ceased and volcano has returned to noneruptive background state.
ADVISORY
Volcano is exhibiting signs of elevated unrest above known background level or, after a change from a higher level, volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.
WATCH
Volcano is exhibiting heightened or escalating unrest with increased potential of eruption, timeframe uncertain, OR eruption is underway but poses limited hazards.
WARNING
Hazardous eruption is imminent, underway, or suspected.

AVIATION COLOR CODES
GREEN
Volcano is in typical background, noneruptive state or, after a change from a higher level, volcanic activity has ceased and volcano has returned to noneruptive background state.
YELLOW
Volcano is exhibiting signs of elevated unrest above known background level or, after a change from a higher level, volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.
ORANGE
Volcano is exhibiting heightened or escalating unrest with increased potential of eruption, timeframe uncertain, OR eruption is underway with no or minor volcanic-ash emissions [ash-plume height specified, if possible].
RED
Eruption is imminent with significant emission of volcanic ash into the atmosphere likely OR eruption is underway or suspected with significant emission of volcanic ash into the atmosphere [ash-plume height specified, if possible].

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Page modified: May 27, 2014 10:23
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