Natural Science Forum / Earth Science / Earthquakes / October 2004

After 36 hours of good activity the amplitude now seems down but the
frequency seems holding/increasing at/to one a minute.  I wonder if there's
been any significant new dome growth in the last two days?

If these folks are to be believed "The Loaf" described below would add a
significant amount of material to an eruptive blast/when/if it occurs. Below
is a "Blurb" from:
http://makeashorterlink.com/?C1CE53679

First of all, I know there are a few professionals that read
this newsgroup. I hope at least one of them is willing to chime
in and explain some of the traces being seen on the webicorders.
In lieu of this, I would like to invite people to go to this page

The Longmire webicorder showed a MAJOR(compared to other recent Longmire
traces) harmonic EQ early this AM 2:08.5 to 2:56PDT(10/8/04)..almost fifty
minutes.  Increased activity but NOT the harmonic showed at Mount Fremont
and Camp Sherman.  All three St. Helens webicorders did NOT ...

A quick check of the webicorders at 9:00PM PDT
shows stronger 'quake activity with the local recorders
going into saturation.  Another steam phase or prelude
to blowout?  We should know by morning.

From the latests siesmographs, it seems as though it's found a natural
rhythm/heartbeat.
Percolating?
--

This one comes out of academia, so I pay more attention.
http://earthobservatory.nasa.gov/Newsroom/NasaNews/2004/2004100417693.html
I wonder if anyone has computed the probabilities and significance.

If you ever give public lectures, here's an interesting effect
I stumbled across this year.
A microwave oven can melt glass if the glass is pre-heated into the
range where it becomes electrically conductive.  BRAINSTORM: a

I forgotten much of the exact timing.  The 1980 eruption went for several
days. weeks?
Then what the timeline is I've forgotten.  What is the dome building
timeline?  How does the seismicity of the dome building period compare to

If the polarity is right then the read is that June lake is 'deflating'.  If
wrong then it's 'inflating'.  This was between 15:36.5 & 15:42.5PDT.  Is
there anywhere on a picture/map that shows the exact location of the three
seismographs on St. Helens?

Earthquake activity seems muted, though there's a moderate
noise floor, possibly due to magma flow?  However, it's nothing
like the saturated webicorders we've been seeing for the
last week or so.

Thought this might be interesting food for
discussion.
http://seattletimes.nwsource.com/html/localnews/2002056366_glacier07m.html
--Damon

Johnston Ridge Observatory is being evacuated in anticipation
of an eruption at any time.
http://www.nwcn.com may have live video on the Web and is
actively covering the event.

Big cloud of something forming over the crater, possibly
steam.
The volcanocam had a bug--literally--in the display, and isn't
being updated frequently.  I'm watching coverage via