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AVO Archived Volcano Activity Notifications

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ARCHIVED REPORT
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KOROVIN VOLCANO



On the morning of Tuesday, June 30, AVO received a report of an eruption of Korovin Volcano from a ground observer in the village of Atka. Low-level eruption plumes were reported, and light ashfall occurred in the village of Atka. The crew of a Coast Guard C-130 confirmed a plume to 16,000 feet (4877 m) ASL. On Wednesday, July 1, inclement weather prohibited direct observation of the volcano. Poor weather conditions also hindered observation of the volcano with satellite imagery. AVO has received no reports of further eruptive activity.



Korovin Volcano is located on the north end of Atka Island in the central Aleutians, 334 miles (538 km) west of Dutch Harbor. It is 13 miles (21 km) north of the village of Atka, population of approximately 100. Korovin is a 5029-foot-high (1533 m) stratovolcano with a basal diameter of 4 miles (7 km). The last reported eruption was in March, 1987.



AVO does not maintain seimic monitoring equipment on Atka Island. However, AVO will continue to monitor the situation closely using satellite and field observations.



ALASKA VOLCANOES



Seismic activity is monitored in real time at 16 volcanoes

in Alaska. Some of these volcanoes may currently display

anomalous seismicity, but they are not considered to be at a

dangerous level of unrest.

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
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URL: avo.alaska.edu/activity/avoreport_archives.php
Page modified: May 27, 2014 10:23
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