The links posted before go straight to today's activity, but don't update -- they'll always point to the Saturday afternoon graph.

Here is the page with all the real-time seismic data:

http://www.pnsn.org/WEBICORDER/GREEN/welcome.html

The ones most worth looking at are:

St. Helens South Ridge (HSR)

(south flank of the mountain)

St. Helens June Lake (JUN)

(slightly farther)

Both of those tend to be saturated at current activity levels.

Rainier - Longmire (LON)

Probably the best site for monitoring current activty, close enough to get strong signals but not saturate. You can tell events from St. Helens: there is a quick sharp peak, a decline, and 20-25 sec later a larger, broader peak. The pattern is due to the faster travel time of the p waves, with s waves arriving a bit later (50 mi distance).

The other Rainer graphs aren't quite as sensitive.

Other good ones, a bit farther away, are Mt. Hood (HOOD) and Green Moutnain (GNW).

The harmonic tremor, signifiying magma movement, just leaps out of the graphs after the 12:15pm (PDT) Saturday steam explosiion. There's lots of molten stuff moving down there....

And the cool thing is, I'll be in Portland next weekend! I have a bunch of work to do, but all stuff I can do from a laptop. I should probably buy a 12V adaptor and just sit in the truck and type while watching the mountain, assuming they don't push the closed area further out.

And assuming the weather is clear, which is a big assumption for mid-October.