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ARCHIVED REPORT
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REDOUBT VOLCANO



04:03: Onset of seismic event accompanied by lightning (detected by LDS system) and thunder; lightning flashes visible from DROF, Kenai, Homer and platforms; color code upgraded to RED. RDN knocked out.

Ash plume reported to 33,000 feet, winds out of NW 90 knots; ashfall reported in Ninilchik, Homer and south of Kasilov.

DROF crew evacuated to offshore platforms. Flood in Drift River valley reaches Cook Inlet via former river channel but primarily from Rust Slough. Water and debris enters oil facility from Rust Slough but causes no damage. Hot dome rocks and ice blocks were carried by the flood. Magnitude of flood is comparable to but slightly smaller than January 2 flood event.



07:30: Level of concern color code upgraded to RED.

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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