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AVO Archived Volcano Activity Notifications

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ARCHIVED REPORT
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VENIAMINOF



The eruption of Veniaminof that began on July 30 continues. On Saturday November 6, U.S. Coast Guard pilots observed and filmed eruptive activity at the intracaldera cinder cone. A new 2.0-x 0.75-km pit had formed in the ice adjacent to the cone on the east flank and contained a lava flow. Steam plumes rose along portions of the outer margin of the lava flow that are in contact with the ice walls in the pit. The crew noted an ash and steam plume rising up to 7,000 ft above the cinder cone (elevation 7073 ft), and a thin layer of ash covered the eastern ice-filled floor of the caldera. The activity is similar to the 1983-84 eruption at Veniaminof, which produced a lava-floored ice pit at the base of south flank of the cinder cone.



COOK INLET VOLCANOES



Seismic activity beneath Mt. Spurr remains low. The current Level of Concern Color Code 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].

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Page modified: May 27, 2014 10:23
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