Eruptions


Image courtesy of AVO/USGS by Cindy Koplin showing the ash fall in Homer, AK on 4/4/09

Not much new to report about the eruption at Redoubt beyond the fact that it continues. AVO has kept the warning level at Red/Warning after briefly dropping it to Orange/Watch on Friday night. The 15,000 foot / 5 km-tall plume on Sunday was mostly water and volcanic gases. Eagle-eyed observers also noticed a plume on the lower flanks on the north side of the volcano that is believed to be steam generated by block & ash flows interacting with snow or water. These flow block & ash flows are coming from the crumbling new dome forming below the 1989-90 domes.

No data so far from the gas flight AVO planned for Sunday, however we do have some sulfur dioxide data showing the plume from Redoubt heading out over the Pacific as of 4/4/2009 from the OMI satellite. There is a lot of chatter about the potential climate effects of the Redoubt eruption and so far there has been very little data to actually make any statements. However, the eruption, so far, has been fairly small in the great scheme of volcanic eruptions (lets say versus Pinatubo in 1991 or El Chichon in 1982) but once we have an idea of the sulfur and carbon dioxide output we can begin to model any potential atmospheric effect.

The ash fall from Redoubt (see above) is beginning to make national news as the winds blow it into more populated areas. So far, the ash has been nothing but a nuisance, but people have a low threshold for nuisances on the whole. It doesn’t stop folks from saying things like:

I would like it to have a big boom and get it over with…

To that I say: be careful what you wish for. It will be interesting to see how people cope with intermittent ash fall for a few months. CNN is even reporting on AVO’s use of Twitter to inform the public on Redoubt’s activity, albeit 3 months after AVO started.

Comments

  1. #1 Nomen Nescio
    April 6, 2009

    that little bird (finch?) in the photo looks decidedly befuddled…

    intermittent, low-level ash fall for a few months won’t be in the news long, i should think. it’ll be a nuisance, to be certain, but so long as that’s all that happens, folks will learn to cope and get on with it. (the “one big boom”, i’d guess, would be much harder to deal with.) how does wildlife tend to adjust to such events, i wonder?

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