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Ys
ysabel
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May 2011
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Ys [userpic]

Mt. St. Helens seismographs:

One week ago
Yesterday
Right now

Wow.

Edit: Also useful/interesting is this summary of seismic data. Red is within the last month, green within the last year, black anything older than that. First picture is depth, second is location, third is a profile view. Makes it pretty clear that this last run of quakes is both bigger and higher than is historically common there.

Current Mood: impressedimpressed
Comments

...I'll take pictures when she blows. Again.

Yup. Living here, under the hovering mountains, its quite impressive.

I hope she doesnt blow again. It was devistating the last time.

So does that mean I should go on my roadtrip out there, or that I shouldn't? Bugger all. Though I would LOVE to *safely* witness an eruption sometime. I remember the first time, though I was kinda young, what got me most was the matter-of-factness that she blew with. I'd never known how Nature worked the cataclysms before, and there she was just an unstoppable force. Maybe she'll put on a show, though something a bit smaller with less damage and the like.

Nobody moved back there, did they?

Oh, and I like the pattern on #3, maybe i could knit it.

Yeah, I saw this a couple of days ago. I'd love to be a fly on the wall at CVO right now...

This is the latest info that was posted to the Washington County ARES/RACES list:

The latest assessment is the possibility of limited magma movement - not to the extent of the 1989-1991 activity, but probably enough to generate dome growth in the crater. Dome growth eventually leads to partial dome collapse. It’s not an eruption, but it could be accompanied by what are called phreatic explosions. In simple terms, this is groundwater or draining surface water hitting hot rock, flashing to steam, and exploding due to volume expansion. It tosses some debris and can generate a cloud of steam and some ash a few thousand feet (or much less), but is well short of catastrophic, limited in extent and duration, and generally not high enough to interfere with commercial aircraft. If ash is released and we’re in an offshore or east or northeast wind condition (like we are currently), then there’s a possibility an ash plume could extend over Washington County. Lots of “ifs” here, but I think it’s important to note that any explosion would be small in comparison to the major eruption of 1980, would contain much smaller amounts of ash, and would not rise to the same elevations (and therefore downwind distances) that occurred in the 1980 event.

At this point I haven't been given any notice to prepare for activation, but I'm checking batteries and supplies. Just in case.

And in classic internet fasion, updates today invalidate my post and return the possibility of explosions. Read more on the USGS website.