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AVO/USGS Volcanic Activity Notice

Volcano: Redoubt (CAVW #1103-03-)

Current Volcano Alert Level: WATCH
Previous Volcano Alert Level: ADVISORY

Current Aviation Color Code: ORANGE
Previous Aviation Color Code: YELLOW

Issued: Sunday, March 15, 2009, 2:50 PM AKDT (20090315/2250Z)
Source: Alaska Volcano Observatory
Notice Number: 2009/A7
Location: N 60 deg 29 min W 152 deg 44 min
Elevation: 10197 ft (3108 m)
Area: Cook Inlet-South Central Alaska

Volcanic Activity Summary: Seismic activity at Redoubt has increased since about 13:00 AKDT and is continuing. An AVO observation flight reported that a steam and ash plume rose as high as 15,000 ft above sea level and produced minor ash fall on the upper south flank of Redoubt. Last reports are that the plume is now mainly steam.

Based on this change in activity AVO is increasing the level of concern and alert level to ORANGE/WATCH.

It does not appear at this time that a significant eruption is likely in the short term, but conditions may evolve rapidly.

AVO is monitoring the situation closely and the AVO operations center in Anchorage is now resuming 24 hour per day staffing.

Recent Observations:
[Other volcanic cloud information] Minor ash fall on the south flank of the volcano from activity at around 13:00. The plume is now mainly steam.
[Volcanic cloud height] Plume height is varying based on the web camera but was reported as high as 15,000 ft above seal level.

Contacts: Tom Murray, Scientist-in-Charge, USGS
tlmurray@usgs.gov (907) 786-7497

Steve McNutt, Coordinating Scientist, UAF
steve@giseis.alaska.edu (907) 474-7131

Next Notice: A new VAN will be issued if conditions change significantly or alert levels are modified. While a VAN is in effect, regularly scheduled updates are posted at
http://www.avo.alaska.edu

The Alaska Volcano Observatory is a cooperative program of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys.
(1) VOLCANO OBSERVATORY NOTICE FOR AVIATION (VONA)
(2) Issued:(20090315/2250Z)
(3) Volcano:Redoubt (CAVW# 1103-03-)
(4) Current Color Code:ORANGE
(5) Previous Color Code:yellow
(6) Source:Alaska Volcano Observatory
(7) Notice Number:2009/A7
(8) Volcano Location:N 60 deg 29 min W 152 deg 44 min
(9) Area:Cook Inlet-South Central Alaska
(10) Summit Elevation:10197 ft (3108 m)
(11) Volcanic Activity Summary:Seismic activity at Redoubt has increased since about 13:00 AKDT and is continuing. An AVO observation flight reported that a steam and ash plume rose as high as 15,000 ft above sea level and produced minor ash fall on the upper south flank of Redoubt. Last reports are that the plume is now mainly steam.

Based on this change in activity AVO is increasing the level of concern and alert level to ORANGE/WATCH.

It does not appear at this time that a significant eruption is likely in the short term, but conditions may evolve rapidly.

AVO is monitoring the situation closely and the AVO operations center in Anchorage is now resuming 24 hour per day staffing.
(12) Volcanic cloud height:Plume height is varying based on the web camera but was reported as high as 15,000 ft above seal level.
(13) Other volcanic cloud information:Minor ash fall on the south flank of the volcano from activity at around 13:00. The plume is now mainly steam.
(14) Contacts:Tom Murray, Scientist-in-Charge, USGS
tlmurray@usgs.gov (907) 786-7497

Steve McNutt, Coordinating Scientist, UAF
steve@giseis.alaska.edu (907) 474-7131
(15) Next Notice:A new VONA will be issued if conditions change significantly or alert levels are modified. While a VONA is in effect, regularly scheduled updates are posted at
http://www.avo.alaska.edu