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Further eruptions at Redoubt, first ashfall on Anchorage 29 March 2009

Posted by admin in activity reports, Alaska, eruptions, Redoubt, United States.
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Photograph of plume from Redoubt's 3:29 pm, March 28 eruption, viewed from Soldotna (photographer David Wartinbee)
Photograph of plume from Redoubt’s 3:29 pm, March 28 eruption, viewed from Soldotna (photographer David Wartinbee). [source]

The eruptive activity at Redoubt continues, with three further eruptions logged by the Alaska Volcano Observatory during 28 March 2009:

  • 13:40 AKDT (21:20 GMT), eruption cloud top at 25000 feet (7600 metres) above sea level. AVO information.
  • 15:29 AKDT (23:29 GMT), eruption cloud top at 35000 feet (10700 metres) above sea level. AVO information.
  • 19:23 AKDT (03:23 GMT), eruption cloud top at 45000 feet (13700 metres) above sea level. AVO information.

The 19:23 eruption cloud passed over the Anchorage area and gave the city its first ashfall of this eruption (although trace amounts from earlier eruptions have been found there). The AVO described the ashfall as ‘minor’ and decreasing, but expects it to continue overnight. An ashfall advisory is in effect until 01:00 29 March 2009.

The latest information from the AVO (2009-03-29 00:23:34) is that seismicity has declined, and that ‘Repeating earthquakes started at 23:52 AKDT and are continuing at this time’. These earthquakes are producing an interesting trace on the REF Webicorder:

AVO Redoubt REF Webicorder, 28/29 March 2009

For all our Redoubt coverage: Redoubt « The Volcanism Blog.

Information
Global Volcanism Program: Redoubt – summary information for Redoubt (1103-03-)
Alaska Volcano Observatory – Redoubt – AVO information and updates for Redoubt
Alaska Volcano Observatory – main page for the AVO

The Volcanism Blog

Comments

1. Craig Heden - 29 March 2009

Regarding the strange Redoubt webicorder trace approx. 0000AKDT 290309.,
similar beahivor can be seen on Mt. Augustine webicorder. The highly repeatable periodicity is strongly suggestive of a data glitch (malunctioning D/A converter, for example) that is affecting multiple stations.

2. Marlene - 29 March 2009

Love your blog – thank you for all the informative articles – I am constantly learning more about the fascinating behavior of volcanos.

3. theroachman - 30 March 2009

According the the webrecorders Redoubt is quite active again. Build up to another explosion?

4. Mount Redoubt Volcano News - 30 March 2009

Great coverage. I’ve been following volcanos since reading about Krakatoa as a kid.

5. theroachman - 30 March 2009

Halema`uma`u seems the conduit is filling with lava at an increased rate.

http://volcano.wr.usgs.gov/kilaueastatus.php

6. Bruce Stout - 30 March 2009

talk about little warning.. I wonder how big the eruption cloud was for that one at 23:14 last night (29 March). Looks like a real cannonshot!


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