AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
Summary | Webcams | Webicorders | RSAM | Activity Notifications | Notification Search | Cleveland | Shishaldin 
You are here: Home > Current Volcanic Activity > Archived Volcano Activity Notifications

AVO Archived Volcano Activity Notifications

2007
December
November
October
September
August
July
June
May
April
March
February
January
2006
December
November
October
September
August
July
June
May
April
March
February
January
2005
December
November
October
September
August
July
June
May
April
March
February
January
2004
December
November
October
September
August
July
June
May
April
March
February
January
2003
2002
2001
2000
1999
1998
1997
1996
December
November
October
September
August
July
June
May
April
March
February
January
1995
1994
1993
1992
December
November
October
September
August
July
June
May
April
March
February
January
1991
1990
1989
ARCHIVED REPORT
Printer friendly version

REDOUBT VOLCANO



02:25: High level of seismic activity slowly increasing.



02:45: Ashfall reported at Kenai airport.



03:23: Pilot report of plume moving east of volcano across Cook Inlet towards Kenai Peninsula.



04:30: Seismicity increasing on summit recorders.



04:50: Power failure reported in Kenai; resumed at different times for different areas.



05:40: Flank seismic stations show increasing activity.



05:50: All seismic stations show increasing activity.



06:16: Onset of seismic event--all stations active.



06:25: Lightning seen and heard in the direction of Redoubt Volcano from Big Rivers Lake Lodge caretakers.



06:35: Power off at KSRN radio, Kenai; they report heavy ash since around 0320.



06:55: Seismic recorders out at NCT and RED probably because of loss of power in Kenai.



08:15: Ash fall at Gould Hall, Anchorage; light ashfall in Anchorage for about 1 hour.



11:00: Strong tremor on RDTZ, corresponds to ash plume reported to 20,000 feet; ash still falling in Kenai.



11:14: Pilot report of ash plume to 25,000 feet and drifting E.



12:00+: Pilot reports of continuous ash plume between 15,000 and 19,000 feet.



15:25: Pilot report of ash plume above 14,000 ft ceiling drifting NNE.



PM(?): Onset of high frequency volcano-tectonic events ranging from 4 to 10 km in depth.

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
Contact AVO Privacy Accessibility Information Quality FOIA
URL: avo.alaska.edu/activity/avoreport_archives.php
Page modified: May 27, 2014 10:23
Contact Information: AVO Web Team

twitter @alaska_avo
facebook alaska.avo
email Receive volcano updates by email: USGS VNS