PSN-L Email List Message
Subject: RE: Short Period Vertical/ Geophones??
From: steve hammond shammon1@.............
Date: Sat, 21 Dec 2002 10:21:45 -0800
I have sent Jim my address. If you are not in too much of a rush on this,
I'll be posting the information on the PSN San Jose web site
http://www.PublicSeismicNetwork.com once I receive it and get it converted
to web format it will be located on page
Regards, Steve Hammond PSN San Jose, Aptos, CA
From: Connie and Jim Lehman [SMTP:lehmancj@............
Sent: Saturday, December 21, 2002 4:34 AM
Subject: Short Period Vertical/ Geophones??
C. Patton, A. Hrubetz, & J. Lahr--your copies of the short period design
are in the mail.
I need some help on mailing addresses for S. Hammond, L. Conklin & F.
Thanks Chris for your comments on geophones. I remember showing the
short period vertical design to a geophysicist who had considerable
experience in exploration using geophones. He said--"Why not use a
geophone?" We got hold of several used discards in good condition and
tried them. They are "strong motion" in nature, but with todays
amplification one can adapt. The units we had were periods less than a 1
second, and were underdamped for our purposes. We wanted parameters to
match the 1 second vertical Springnether (sp) professional sensor the
Geology Dept. was using at that time--for comparison purposes. We never
pursued the idea further--but felt it had possibilities.
No doubt there are persons out there like Chris that have had some
experience with geophones. They are compact--a neat package and reasonably
economical--a quick way to go vertical-- if you can adapt the parameters to
be within the wishes of an amateur seismologist.
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