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AVO Archived Volcano Activity Notifications

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Archived Report
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VENIAMINOF



Continuing eruptive activity at Veniaminof cannot be confirmed; heavy cloud cover during the week hampered pilot observations of the volcano. The last report of activity was received on August 12.



SEGUAM



On August 19, U.S. Coast Guard observers reported that Pyre Peak on Seguam Island was continuing to erupt from a vent located an estimated 600 feet below the 3458-ft summit. A dark ash plume had reached an altitude of 8500 feet over the volcano and was drifting ESE. AVO has received no reports of ashfall in the sparsely populated region.



COOK INLET VOLCANOES



Seismicity beneath Mt. Spurr remains low. The current level of concern color code for Mt. Spurr is GREEN.



Seismicity at Augustine, Redoubt, and Iliamna volcanoes remains at normal levels.

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].
PDF version of these definitions
URL: avo.alaska.edu/activity/avoreport_archives.php
Page modified: June 11, 2012 11:50
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