Right, the neighboring seismograph stations are picking up the activity at Mt. St. Helens. I put this on another thread also, here it is again for ash cloud tracking satellite views, inlcuding infrared. That might be useful if it happens at night.
http://www.ssd.noaa.gov/VAAC/hele-img.html
Comparing the charts since midnight from Longmire and June Lake show alot of similarity, even though the charts on Rainier (Longmire) show a lot higher amplitude.
It could just be a calibration thing.
I live 40 miles from Rainier and if anything was happening there, I'd felt or seen something by now.
OK.
Looking at the charts again I will say this. The activity on Rainier is from St. Helens
The charts from June lake are showing (correctly) a much higher amplitude.
In all my years of watching USGS and Pacific seismograph network stuff, I have NEVER seen this kind of activity.
I never thought I'd say it, but it's a little scary.