Natural Science Forum / Earth Science / Earthquakes / September 2004

Quick Question.
The webicorders all over the cascades etc, for instance
http://www.ess.washington.edu/SEIS/PNSN/WEBICORDER/GREEN/JUN_EHZ_UW.2004093012.html
is there a simple translation from the level of activity to the force

What if Mt. St. Helens begins a long life of spewing ash and lava?
The prevailing winds carry a continuous plume of ash towards Spokane,
Tri Cities and even far away as Boise.  Year after year, eruption
after eruption, ash falls on the Palouse farmlands smothering the once

A new online seismograph/helicorder site at June Lake has been put online
for Mt St Helens. See JUN EHZ UW : St. Helens - June Lake at:
http://www.ess.washington.edu/SEIS/PNSN/WEBICORDER/GREEN/welcome.html
This helicorder for this station is slightly less saturated than the Dome &

I have started making animations for the Parkfield quake
like I had for the Adobe Hills swarm.
Look in the quakes section of my web site, URL in my tag line.
Brian

http://www.geophys.washington.edu/SEIS/PNSN/HELENS/mshfigs.html

Post Parkfield:
An M7.8 or higher on the SAF with hypocenter between the Antelope Valley
Freeway and I-15.  This will occur before April 30, 2005.  I don't
qualify for the contest.  This is the first time I did this.

The buzz seems to be (www.nytimes.com) that this was the quake
predicted for
1988.  A huge amount of money was spent instrumenting and studying the
site,

1.047 g acceleration was measured on the Hwy 46 Cholame Creek bridge
structure, 11 km from the epicenter of the Parkfield Quake.
http://www.quake.ca.gov/cisn-edc/IQR/Parkfield_28Sep2004/iqr_dist.htm
Brian

Earthquakes, storms, hurricanes, volcanoes, and now an asteroid. A
little off topic, but I know that God hates Florida, but hey, the
Second Coming isn't supposed to happen yet, we got until 2012 or maybe
the elections, but I got news for you, Jesus ain't coming.

A Mag 5.9 EQ followed by an after shock sequence of a Mag 5, 3 Mag 4+ &
multiple smaller EQ's occurred @ 10:15 local time. See:
http://quake.wr.usgs.gov/recenteqs/Maps/120-36.html
Ralph Nesbitt

Just felt another quake here on the coast---gentle roller, but long.
Looks like a five something NE of Arvin.
PennyB

Greetings    
I published a new web site:    
http://www.geologistonline.com
News, Forums, Links, Donwloads, please visit..

A significant swarm of EQ activity has occurred/is continuing at Mt St
Helens. Below is a portion of the Mt St. Helens Information Statement from
September 24, 2004. For full statement see:
http://vulcan.wr.usgs.gov/Volcanoes/Cascades/CurrentActivity/current_updates.html

I mention it because of the quake link.
http://www.cnn.com/2004/TECH/science/09/13/erupt.maunaloa.ap/index.html

The near realtime seismograph tracings has changed in characters in the last
several minutes:
http://www.pnsn.org/WEBICORDER/GREEN/SEP_EHZ_UW.2004092900.html
Anyone know the meaning?