In a message dated 2006/09/05, JohnJan@........ writes:

> Not too good for distant earthquakes, but the price is right, especially
> if you live near Stanford University. These should NOT go into the
> landfill!!!
> John
> 
> >Subject: 8 Hz geophones, vertical and horizontal, available free to a
> >good home
> >Stanford University owns a large number of 8 Hz geophones, as used in
> >conjunction with the Seismic Group Recorder (SGR-III) facility in
> >many PASSCAL experiments from 1980 to 2001.
> >We have about 200 "short" strings of 6 modified Mark Products L-10B
> >vertical-component geophones (8 Hz) connected in series, with c. 1 m
> >cable between each phone.
> >We also own a larger number of "long" strings of 12 L-10B vertical
> >phones, or of 12 horizontal phones, in each case with c. 15 m cable
> >between each phone, one string per clip.

Dear Professor Klemperer,

       Have you contacted anyone interested in archaeology? These string 
lengths and operating frequencies sound about right for that type of surveying? 

       Would they be of use for monitoring volcanoes?

       Regards,

       Chris Chapman
In a me=
ssage dated 2006/09/05, JohnJan@........ writes:



Not too good for distant earthq=
uakes, but the price is right, especially

if you live near Stanford University. These should NOT go into the

landfill!!!

John



>Subject: 8 Hz geophones, vertical and horizontal, available free to a
>good home

>Stanford University owns a large number of 8 Hz geophones, as used in
>conjunction with the Seismic Group Recorder (SGR-III) facility in

>many PASSCAL experiments from 1980 to 2001.

>We have about 200 "short" strings of 6 modified Mark Products L-10B

>vertical-component geophones (8 Hz) connected in series, with c. 1 m

>cable between each phone.

>We also own a larger number of "long" strings of 12 L-10B vertical

>phones, or of 12 horizontal phones, in each case with c. 15 m cable

>between each phone, one string per clip.




Dear Professor Klemperer,



       Have you contacted anyone interested in=
 archaeology? These string lengths and operating frequencies sound about rig=
ht for that type of surveying? 



       Would they be of use for monitoring vol=
canoes?



       Regards,



       Chris Chapman