In a message dated 2006/10/18, gmvoeth@........... writes:

> Hello Ted;
> The file 061017.013725.ebgz.psn is way too noisy. The gain should be reduced
> to the point where noise is only +/- a few counts.
> 
> This signal reminds me of the Hawaii quake I received but instead of getting 
> any S wave I just got two "P" waves (Main event/aftershock) and what seemed
> to be followed by surface waves.

Hi Geoff, Ted,

       This advice is not correct. Ted has a Lehman which senses the 
microseismic background of 0.5 to 15 microns amplitude as well as quake signals. Ted 
will want to sense longer period quakes which are a small fraction of this 
amplitude and to filter them out, so he needs the background to be at least 100 
counts.  

       Regards,

       Chris Chapman
In a me=
ssage dated 2006/10/18, gmvoeth@........... writes:



Hello Ted;

The file 061017.013725.ebgz.psn is way too noisy. The gain should be reduced=


to the point where noise is only +/- a few counts.



This signal reminds me of the Hawaii quake I received but instead of getting=
 any S wave I just got two "P" waves (Main event/aftershock) and what seemed=


to be followed by surface waves.




Hi Geoff, Ted,



       This advice is not correct. Ted has a L=
ehman which senses the microseismic background of 0.5 to 15 microns amplitud=
e as well as quake signals. Ted will want to sense longer period quakes whic=
h are a small fraction of this amplitude and to filter them out, so he needs=
 the background to be at least 100 counts.  



       Regards,



       Chris Chapman