Eruptions

Redoubt status returned to Orange

Posted by Erik Klemetti on March 25, 2009
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Image courtesy of AVO/USGS. Taken by Cyrus Read

Based on the current levels of seismicity over the past 36 hours, AVO has returned Redoubt to Orange/Watch status from Red/Warning. This doesn’t mean that the eruption is over, just that things have settled down a bit. Flights to and from Anchorage have resumed as well. You can read the full statement here, but the take-home messages are:

  • AVO expects this to be like the 1989-1990 dome-building eruptions, although no new dome magma has been seen yet (mostly thanks to poor weather).
  • Dome collapse will likely generate pyroclastic flows with little to no warning. These may move down the Drift River glacier – this will produce lahars, mudflows and floods.
  • Dome growth and destruction (sometimes explosively) will likely occur for the next few months at least.

So, expect explosions, slow magma extrusion to form domes, pyroclastic flows, Peléan-style (named after Mont Pelee in Martinque) dome collapse and lots of ups-and-down on the Redoubt rollercoaster.

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Comments

  1. #1 theroachman
    March 25, 2009

    Lets hope the weather clears soon so we can see what happen.

  2. #2 theroachman
    March 25, 2009

    The weather does not look like it is going to clear in the next 24 hours at least according to the latest satelite views.

    http://www.ssd.noaa.gov/VAAC/ALEUT/SOUTH/VIS/20.gif

  3. #3 Chris
    March 26, 2009

    Another explosion today, looks like it might be the biggest yet. Latest from AVO: “A major explosive event occurred at 09:24 AKDT. Pilot reports the cloud height to be at least 65,000 ft above sea level.”

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