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Redoubt plume hits 18km altitude 23 March 2009

Posted by admin in activity reports, Alaska, eruptions, Redoubt, United States.
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The most recent volcanic ash advisory from Anchorage VAAC, issued at 17:25 GMT (09:25 local time) gives the plume altitude as FL600, which is 60000 feet, or over 18km. We’re reliant on such verbal descriptions at the moment, as the Alaska Volcano Observatory Hut webcam – the nearest to the summit of Redoubt – has been knocked out, and the Cook Inlet camera is showing nothing but murk.

The latest AVO update (07:46 local time, 15:46 GMT) reports that ‘Ash plumes generated by the explosive bursts are drifting north-northeast. Ash fall has been reported in Skwentna and the Chuitna area’, and says that an overflight is planned for later this morning.

UPDATE: A further AVO update (11:29 local time, 19:29 GMT) has pushed the overflight back to ‘this afternoon’. The update also reports: ‘The eruption of Redoubt volcano continues. The last large explosive burst occurred at 4:31 AKDT. There have been several smaller bursts lasting for 1-2 minutes since then. Ash plumes generated by the explosive bursts are drifting north-northeast. Ash fall has been reported in Skwentna and the Chuitna area’.

There’s more on this eruption at Dr Erik Klemetti’s Eruptions blog.

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
Anchorage VAAC advisories – volcanic ash advisories issued by Anchorage VAAC are archived here

The Volcanism Blog

Comments

1. SHIRAKAWA Akira - 23 March 2009

By comparison, the 1989-90 eruption produced ash plumes up to 12,000 meters of height, or about 40,000 feet (Source: AVO).

I don’t know how much atmospheric conditions affect these numbers, though.

2. theroachman - 23 March 2009

mean while over on the big island of hawaii

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

interesting. I will need to pay more attention tonight to the web cam


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