[PennyB]

(04-20-2015, 11:24 PM)Skywise Wrote:

(04-20-2015, 08:20 PM)PennyB Wrote:

(02-27-2015, 09:35 PM)PennyB Wrote: Just noting, as I always do since I live on the slopes of this volcano!

Here is link: http://volcanoes.usgs.gov/volcanoes/moun...ing_4.html

The USGS has a separate page for California volcanoes. I'm out of date on my seismograph reading, but still...

If you're going by the seismographs, I don't think those are quakes. Not really sure, but they look more like debris flows to me the way they build up over minutes then fade over minutes. Quakes come on quickly especially the closer the station is to the source.

Nice page, though. I've bookmarked it.

Anyway, I'm sure you'd get plenty of warning before Shasta decided to pop it's top.

Brian

Possibly. I've just never seen anything quite like this before on the mountain. I'm not an alarmist by any means, and I do have a degree in Geology. I note that on the SW side, not much happening. But the other two seismographs show quite a bit of activity that I haven't noticed before. Always good to be aware! I'll still go ahead and plant my new garden! I note that in the April 10 news on the USGS California Volcano site, they do note increased seismic activity on Shasta--but claim no "Immediate" hazard.