reply to post by lonewolf19792000
Your comments about the destructive effects of volcanoes are quite correct and certainly don't over-state the matter.
I'd recommend that if any members would like to read a fairly "close and personal" perspective on the eruption of Mt St Helens, just click on the
first link in Westcoast's signature -- the one that's entitled "The Day My World Shook". It's an excellent presentation of what she experienced.
Regarding the comment that the quake directly below Rainer could indicate magma pressure buildup, I'd suggest that it doesn't. Granted, it
be an indicator that magma might be shortly on the move, but not right now: while the seismo Westcoast linked to shows quakes there
(including many microseisms), there is no suggestion of harmonic tremor (HT), and it's the HT that scientists look for as the primary indicator of
magma movement and related pressure buildup.
If we start to see HT on the seismos close to Rainer along with quake swarms, then it's time for people in the vicinity to make sure all bug-out bags
are ready. It was the increase in HT (and associated small, volcanism-induced quakes) at El Hierro that led the experts and authorities to call for
evacuations of people there. HT is the
key indicator because it's possible to track the actual movement of magma by studying the HT traces and
locations, so it's the one that we have to watch for.
I am watching Rainier right now on GEE, on the seismo TA.F04D-Rainier. No HT there at this time, which is good news. (EDIT: Please see TrueAmerican's
note to me below...)
There are a few of us who'll be keeping an eye on this, at least while Westcoast and other members in that part of the world are getting some
shut-eye. If we see anything important we'll post about it, either here or in the ongoing Quake Watch or Volcano Watch threads -- or in a new thread
if it's very significant.
Also, I have ways to contact some people directly in some parts of the US if the need is urgent and I believe there are other members who have similar
arrangements. In fact I'd recommend that if you live in a region like the PNW and down to Cali (where eruptions and large quakes are always possible,
even if relatively rare), it would be worthwhile to set up contact arrangements with people who live several time zones away and who can get a message
to you even if it's the middle of the night where you are. They don't need to be people who can read seismos, if it's something very major they'll
probably know about via MSM -- or most likely sooner if they're on ATS!
For example, it's just on noon here on Friday Oct 15, but in the PNW it's still some hours before dawn of Friday morning. In situations where there
might be a serious threat from nature's forces we can often be online and watching when you need to sleep.
edit on 15/10/11 by JustMike because: I added an edit