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Date Posted: 15:01:38 09/29/02 Sun
Author: Mae
Subject: Re: Frank Condons update
In reply to: Mae 's message, "Frank Condons update" on 14:57:45 09/29/02 Sun

>http://pub13.bravenet.com/forum/fetch.php?id=9892621&us
>ernum=1066505315
>
>Don't know if this will work here...

Hmmm...here's a copy/paste:
Date: September 29, 2002 at 05:30:18 (pacific time)
From: Frank Condon,
Subject: 24 Hour ULF: Anza/Borrego
URL: 24 Hour ULF Report

Hello all:
With all of the activity going on at the northern edge of the Mojave Desert Block I decided to do an in depth analysis this evening. By going over the list of microquakes I
observed certain new patterns in development. Possibly the Trona Quake swarm is headed towards the Southern Death Valley fault zone as the stress jumps over the Panamint
Valley fault. It's now over one week since the beginning of the doubling of the MT reading from near 6 to 7 units and it's currently averaging better than 12 units of regional
tectonic stress. We now need to watch the faults which span from near Ludlow and Barstow towards the northern edge of the Mojave Desert Block near Ridgecrest, CA.
This is most likely the weakest point along the next segment to break in that region. The Garlock FZ is now under extreme pressure from the ECSZ fault complexity in the
region that is pushing it to the north and we need to consider that either Coso Volcanic Center,Walker Pass, Lake Isabela or Bishop/Mammoth Lakes may begin to act up in the
near future as a result of this Trona swarm and stress transfer from the Mojave Desert Block to the Inyo-Mono and Sierra Nevada blocks. Also, the Delta-Index is now at an
all time low reading of 5.01 nT. This indicates that the local geomagnetic field is highly suppressed in this area close to the Cajon Pass and the San Andreas, Northern Frontal
and Helendale faults. My guess here is that since the -60nT shift there was a significant thermal change at depth which caused the magnetic properties of the rock structure at
depth below the lab (1 to 2 miles) to change with the Curie (Temperature)Point. So is this another good indication that the Pacific plate boundary at the big bend is surely but
slowly subducting beneath the North American Plate from Gorman to Morongo Valley? It appears that it's doing just this. The other areas with ULF activity included the San
Jacinto/Elsinore fault from Hemet to Borrego Springs and Julian, CA.

Frank Condon
GeoSeismic Labs





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