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Ontake

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Katherine . BPL Member
PostedOct 2, 2014 at 10:56 am

I've noticed there are some Japan-based members here. I hope none of you had family or friends on the mountain when it erupted.

Given that many of my hikes are on a volcano, it hit home.

Any other thoughts, observations?

In terms of the practical, all I can think of is maybe tuck a face mask in the first aid kit.

Jerry Adams BPL Member
PostedOct 2, 2014 at 11:13 am

Yeah, I was thinking the same

Similar volcanoes in Oregon and Washington. St Helens used to be called "the Mount Fuji of the …"

There were people killed by Mt St Helens, but it had some warning, although the eruption was much bigger than expected. I was hiking 20 miles South – if I was 20 miles North I think it would have been a problem.

Mt Hood, Rainier, Sisters,… are capable of big eruption. Mammoth I believe in Sierras, although mostly they're not volcanic.

I don't think a mask would make much difference.

Bob Gross BPL Member
PostedOct 2, 2014 at 12:58 pm

"Mammoth I believe in Sierras, although mostly they're not volcanic."

Mammoth is most certainly volcanic, and it has active fumaroles. Well, for that matter, Shasta and Lassen have active fumaroles as well.

The seismic team at USGS is pretty diligent with its instrumentation of U.S. volcanoes, and it is difficult to get a complete eruptive surprise except in some really remote spot.

The Ontake eruption was phreatic in nature, which is slightly unusual. You can see a good resulting example of that in the Inyo Craters, near Mammoth.

–B.G.–

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