Hi All,

I recently obtained the calibration for the LISS helicorder displays 
which are to be found at   http://www.liss.org/    From there you can 
go see US stations on the ANSS or stations world-wide on the GSN.

According to Bob Hutt of the USGS/ASL the displays are set up to have 
a velocity response of 333 nanometers per second per line, with a 
bandpass from 360 seconds to 20 seconds.  That long-period filtering 
mainly shows surface waves from relatively distant events, pretty 
much eliminating high frequency local quakes and the higher frequency 
phases of teleseisms.

We have on occasion been able to use the LISS to confirm the 
existence of events which we had seen but which weren't appearing in 
the USGS' "Latest Earthquakes" lists.

Regards,
Brett


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