PSN-L Email List Message

Subject: ULF
From: Arie Verveer ajbv@............
Date: Wed, 27 Dec 2000 09:28:03 +0800

Hi, In Larry's event folder are two files 001225a.au2, 001225a.au4 that
show the ULF magnetic background and a seismic trace of the Mb5.8 event
1231Km south of my location. The magnet trace for that day shows some 
solar interaction. Though the trace shown here is the only long wave 
magnetic variations for that day. Its interesting to ponder if this is 
associated in some way. Maybe a precursor or a trigger or just a 

Since I've been monitoring both the seismic and ULF magnetic background
the device has logged a few potential triggers on local quakes and far
less detection of possible precursor's. But if you look at the frequency
of quakes then the data can be said to be statically insignificant. It
should be said that it may be my equipment that's not sensitive enough
or my location is not close enough to a fault line. Also it would be
better to conduct this type of experiment during a solar quiet time. 

One thing I have noticed that during intense activity of the magnetic
field the seismic trace shows "pulses" of induced noise. On both amateur
and professional seismometers. 

Cheers and good new Millennium.


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Larry Cochrane <cochrane@..............>