PSN-L Email List Message

Subject: Re: Microseism modulation
From: =?ISO-8859-1?Q?J=F3n_Fr=EDmann?= jonfr@.........
Date: Tue, 22 Dec 2009 21:36:10 +0000

Hello all,

Micro-earthquakes have high frequancy but low energy. This is common for
earthquakes that are from -2.0ML and up to 2.50ML in size. The best way
to detect micro-earthquakes is with a seismomter that has main frequancy
of 1Hz and up to 4,5Hz. The only expection from this appears to be if
the earthquake is magma or volcano activited.

J=F3n Fr=EDmann.

On =FEri, 2009-12-22 at 13:18 -0700, Chuck/Judy Burch wrote:
> Randall,
> Could you further explain your procedure for detecting modulation of=20
> microseisms by free mode energy?  What specifically are you doing with=20
> the narrow bandpass filter?
> Thanks,
> Chuck Burch
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