Denny,
I did some experimenting a while back on this, but then put it on the
back burner.  The idea was to reflect a beam from a small mirror
on the sense arm to a linear ccd detector, sensing displacement
by which cell or cells were "on".

Raul

Denny Goodwin wrote:

> All -
> Just joined the e-mail net and got my first messages.  Becoming
> interested in seismic measurements - again.  Several years ago a friend
> and I both made swinging gates and we experimented with various detection
> methods but we never followed up on project.  He recently purchased a
> surplus 10 Hz geophone and has tinkered with it some.
>
> Anyone using lasers for detection - if so, how?
>
> I am also a ham radio operator.  Are there any ham nets devoted to
> seismic work?  Would be interested to hear. Thanks...
>
> Denny Goodwin, KF4BL
> dennygwin@........
>
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