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Redoubt Update: March 31, 2009

Posted by feww on March 31, 2009

Redoubt Activity – Color Code RED : Alert Level WARNING

Date Time :  March 31, 2009 1330 UTC/ March 31, 2009 0530 AKDT

On 2009-03-31 at 05:28:55 AKDT AVO reported:

Seismicity at the volcano has been low, but remains above background level. Weak tremor and small discrete earthquakes have been observed in the past hour.

Latest Images from AVO


Photograph of impact from the volcanic ash fall out in Nikiski, AK from Redoubt volcano. This plume was generated during the March 28, 15:29 AKDT, 2009 event, and ash fall began at approximately 16:16 AKDT and lasted maybe 5 minutes. Fine ash is resuspended as vehicles drive over the recently deposited ash fall deposit. Picture Date: March 30, 2009 16:45:00 AKDT. Image Creator:  Kristi
Wallace. Image courtesy of AVO/USGS. [Image added March31, 2009]


Photograph of Redoubt Volcano in eruption taken during observation and gas data collection flight on March 30, 2009. View is to the east. Continuous emission of volcanic gas, water vapor, and ash is producing a plume rising to about 15,000 feet above sea level. The haze at left below the drifting cloud is a region of active ash fall. AVO scientists observed ash falling up to 25 miles downwind. Picture Date: March 30, 2009 AKDT. Image Creator: Heather Bleick. Image courtesy of AVO/USGS.
[Image added March31, 2009]


Photograph taken during observation and gas data collection flight on March 30, 2009. Looking east / southeast down into the upper crater rim of Redoubt Volcano.
Picture Date: March 30, 2009 AKDT. Image Creator:  Heather Bleick. Image courtesy of AVO/USGS.


Photograph taken during observation and gas data collection flight on March 30, 2009. Picture Date: March 30, 2009 AKDT. Image Creator: Heather Bleick. Image courtesy of AVO/USGS.


Photograph taken during observation and gas data collection flight on March 30, 2009. Picture Date: March 30, 2009 AKDT. Image Creator: Heather Bleick. Image courtesy of AVO/USGS.


Photograph taken during observation and gas data collection flight on March 30, 2009. Picture Date: March 30, 2009 AKDT. Image Creator: Heather Bleick. Image courtesy of AVO/USGS.


Photograph taken during observation and gas data collection flight on March 30, 2009. Picture Date: March 30, 2009 AKDT.  Looking at the north flank of Redoubt Volcano.
Image Creator: Heather Bleick. Image courtesy of AVO/USGS.


Photograph taken during observation and gas data collection flight on March 30, 2009. Picture Date: March 30, 2009 AKDT. Image Creator: Heather Bleick. Image courtesy of AVO/USGS.


Photograph taken during observation and gas data collection flight on March 30, 2009. Picture Date: March 30, 2009 AKDT.
Looking east at Redoubt Volcano. Image Creator: Heather Bleick. Image courtesy of AVO/USGS.


Photograph taken during observation and gas data collection flight on March 30, 2009. Picture Date: March 30, 2009 AKDT.  Looking at the north flank of Redoubt Volcano.
Image Creator: Heather Bleick. Image courtesy of AVO/USGS.


BSE image showing groundmass, with glass, plagioclase, pyroxene, and oxide microlites. The scale bar is absent here, but the image was collected at 400 X, compared with 100 X from image 17485 [SEE BELOW.]  Picture Date: March 30, 2009. Image Creator: Jessica Larsen.  Image courtesy of the AVO/UAF-GI.


BSE image showing amphibole grain with reaction rim in sample AT-1605. Image Creator: Jessica Larsen.  Image courtesy of the AVO/UAF-GI.


Redoubt 15:29 eruption, 3/28/2009. Picture Date: March 28, 2009 AKDT. Image Creator: Tricia Joy Sadler. Image courtesy of the photographer.


Photograph of lightning from Redoubt’s 1:20 am March 28 eruption, courtesy of Bretwood Higman. Picture Date: March 28, 2009. Image Creator: Bretwood Higman. Image courtesy of Bretwood Higman.

For background information and selection of previous images see:

One Response to “Redoubt Update: March 31, 2009”

  1. Redoubt is putting on quite a show. Wonder if this is only the opening act?

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