Eruptions

Redoubt ash throws off Alaska’s legislative calendar

Posted by Erik Klemetti on March 23, 2009
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The Anchorage Daily News has a report that 16 Alaskan representatives got stuck in Anchorage after the eruption started. They were headed to Juneau to vote on Alaska accepting stimulus money (“volcano monitoring” anyone?), but they were on one of the many flights canceled by Alaska Airlines today due to the ash. ADN also have reports of an “ash out” in the coastal town of Skwentna.

AVO is currently reporting that ash doesn’t appear on the current radar maps in the Cook Inlet and there are no reports of new ash fall. This suggests that the ash is either staying below 13,000 feet / 4,000 meters or is too fine to appear on radar. Fine ash is less likely to fall out of the air quickly, so it can both travel far and be hard to detect – making it especially hazardous for aircraft. This is why VAAC warning for ash always err on the side of caution.

Still no visuals on the volcano, but an overflight might get some pictures if conditions go in AVO’s favor. Instead, I’ll post an image of how it likely looks if the eruption is similar to the 1989-90 eruption (see above).

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Comments

  1. #1 Ediacara
    March 23, 2009

    Hut webcam’s back to work!!!
    http://www.avo.alaska.edu/webcam/Redoubt_-_Hut.php

  2. #2 EKoh
    March 23, 2009

    From the Hut cam image it looks like there could be some lahar deposits as well as ashfall on the snow.

  3. #3 Erik - Eruptions
    March 23, 2009

    I agree, it looks like there might be a lahar deposit on the lower slopes from meltwater of the glaciers near the 1989-90 domes. This stuff is feeding off into the Drift River valley. Also, you can now see a small ash column in the webcam (at 9PM Pacific)!

  4. #4 Bruce S.
    March 24, 2009

    some clear views now just on sunset. The glacier has gone (surprise, surprise) and definite signs of lahars into the drift valley. Ash blanketing the NW slopes.

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    some clear views now just on sunset. The glacier has gone (surprise, surprise) and definite signs of lahars into the drift valley. Ash blanketing the NW slopes.

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    May 18, 2011

    I agree, it looks like there might be a lahar deposit on the lower slopes from meltwater of the glaciers near the 1989-90 domes. This stuff is feeding off into the Drift River valley. Also, you can now see a small ash column in the webcam (at 9PM Pacific)!

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