I have had several comments regarding the the necessity or desirability =
of filtring out microseism. It is always true that one persons "noise' =
is anothers "data"
 I have also been fascinated by the microseism phenomenon itself and =
have watched the effects of weather on the signature. I have also been =
frustrated by the my attempts to extract earthquakes from the background =
of the microseism. I value you comments and perspective. I need the =
advice of those with exprience in this field.
I look at this as an experiment and learning experience as I am NOT an =
expert in this field. (I also have a switch to turn the filter off.)

I have wondered about possible masking effects of true seismic event =
signatures. In that context I have considered an automatic switch which =
would turn off the filter when the level in the filter bandwidth becomes =
suddenly larger than the long term average.Of course techniques like =
that always have the problem of having the signal of intrest gone by the =
time you recognize it

I appreciate the comments and thank you for them.








I have had several comments regarding =
the the=20
necessity or desirability of filtring out microseism. It is always =
true=20
that one persons "noise' is anothers "data"
 I have also been fascinated by =
the microseism=20
phenomenon itself and have watched the effects of weather on the =
signature. I=20
have also been frustrated by the my attempts to extract earthquakes from =
the=20
background of the microseism. I value you comments and perspective. I =
need the=20
advice of those with exprience in this field.
I look at this as an experiment and =
learning=20
experience as I am NOT an expert in this field. (I also have a switch to =
turn=20
the filter off.)
 
I have wondered about possible masking =
effects of=20
true seismic event signatures. In that context I have considered an =
automatic=20
switch which would turn off the filter when the level in the filter =
bandwidth=20
becomes suddenly larger than the long term average.Of course techniques =
like=20
that always have the problem of having the signal of intrest gone by the =
time=20
you recognize it
 
I appreciate the comments and thank you =
for=20
them.
 
Dave Nelson