PSN-L Email List Message

Subject: Unknown Seismometer
From: Karl Cunningham karlc@.......
Date: Tue, 05 Dec 2000 13:36:07 -0800

Hello --

I am interested in identifying an old piece of equipment that I think is a
vertical seismometer.  A picture is at:

It is about 24 inches long (note Kinemetrics Ranger in background for
scale), and has no labels or names anywhere on it.  Through the window I
can see a coil of wire (like a speaker voice coil), and the donut-shaped
piece is magnetic.  There are three boxes of electronics connected to it --
one appears to be an attenuator, another a filter, and another probably an

I would appreciate hearing anyone's comments about it.

Thanks in advance,
Karl Cunningham


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