Hi

There is a large diffrence between a geophone with 24Hz natrual
frequancy and a sensor with 1Hz natrual frequancy.

The clicking noise problay is the mass in the sensor hitting the end of
the coil or the end of the housing.

I have not worked with this type of seismometer, but I do have two 4.5Hz
geophones to record earthquake.

Regards.
--=20
J=F3n Fr=EDmann
http://www.jonfr.com
http://earthquakes.jonfr.com
http://www.net303.net
http://www.mobile-coverage.com/

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