Wednesday, 29 September 2004

USGS officials are holding a news conference right now, and have just announced an explosive event on Mt St Helens is possible, and the alert level has just been raised by the USGS for the mountain. The lava dome in the crater has apparently moved a measurable amount, and seismic activity has taken a noticible upturn.

They are now seeing quakes at the rate of 4 a minute. They are larger quakes, 2 to 2.5 in magnitude. Describing the seismic activity, they say it is definitely ramping up and plateauing in phases, not falling back down. Explosion and ash are the risks. This behavior is similar to what was observed on the mountain in 1986: Big increases in seismic energy over past 8 hours.

I'm at the airport flying out to Reno at 12:45, mobile posting from my handheld device. I hope it keeps its top on.

Update: USGS Advisories and information about the mountain activity available here.



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Mt. St. Helens | Random Stuff
Wednesday, 29 September 2004 10:23:42 (Pacific Standard Time, UTC-08:00)
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Wednesday, 29 September 2004 21:42:39 (Pacific Standard Time, UTC-08:00)
It doesn't have a top any more. I'm actually hoping for an event. It should be small and fun to watch. Not as many people live around the area as they did in 1980. Great geological fun right in our backyard!
Monday, 05 November 2007 17:44:47 (Pacific Standard Time, UTC-08:00)
i love this site!
sean
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