Stephen
Thanks very much - also.
Barry


--- On Wed, 10/21/09, Stephen & Kathy  wrote:

From: Stephen & Kathy 
Subject: Re: Instrument quality - microseisms
To: psn-l@..............
Date: Wednesday, October 21, 2009, 8:53 PM

=0A=0A=0A  =0A  =0AHi Barry, I'm a little south of you...=A0=A0 I also=0Aha=
ve increased noise.=A0 Whenever I see this kind of noise, I check with=0ABe=
rkeley at:
=0Ahttp://quake.geo.berkeley.edu/bdsn/make_seismogram.html
=0A
=0AIf you just create plot without setting time, it will create todays=0Ase=
ismogram for CMB... I use 4 for compression to get an hour per line;=A0=0Aa=
nd pixels at 25 to get a little separation.=A0 Sorry if I am sharing old=0A=
info...=A0=A0 if so, maybe it will help others?=20
=0A
=0AIf you check the following ocean weather link you will see why...=A0=0At=
here are 20 to 25 foot waves off the NW USA coast.=A0=A0 Earlier, they=0Awe=
re showing up to 30 foot waves. You can click on any box to see the=0Acondi=
tions in the box...=A0 I click on the box that shows Alaska to below=0ABaja=
....=A0=A0 and yes, the energy is apparently coming from 200 to 400=0Amiles =
away:
=0Ahttp://www.oceanweather.com/data/
=0A
=0AAt one time I had my gain so high that noise like this would set off my=
=0Aalarm, (I have a separate alarm, which I built before I had a computer=
=0Aand recording capability).
=0A=A0 Stephen
=0A=A0 PSN Station #55
=0A=A0 38.828N=A0 120.979W
=0A=A0 near Pilot Hill Calif =A0=20
=0A
=0ABarry Lotz wrote:=0A=0A  =0A    =0A      =0A       =20
=0ATo all
=0ARelated to instrument quality- maybe. I have noticed a lot more=0Amicros=
eismic activity the last few days. The background noise on my=0Avertical is=
 around +/- 300 counts @=A0 8.7 sec=A0 and 6.6 sec=A0 (two narrow=0Apeaks).=
 I don't remember this magnitude in years past. I'm sure it is=0Aweather re=
lated. I live about 200 miles east of the west coast of=0Anorthern Californ=
ia. Anyone else noticed an increase in background=0Alately? Every time I lo=
ok at the output I think I'm looking at surface=0Awaves after an event.
=0ABarry
=0A       =20

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Stephen
Thanks very much - also.
Barry<=
br>

--- On Wed, 10/21/09, Stephen & Kathy <skmort@wildb=
lue.net> wrote:

From: Stephen &a=
mp; Kathy <skmort@............>
Subject: Re: Instrument quality - =
microseisms
To: psn-l@..............
Date: Wednesday, October 21, 200=
9, 8:53 PM

=0A=0A=0A  =0A  =
=0AHi Barry, I'm a little south of you...  =
 I also=0Ahave increased noise.  Whenever I see this kind of noise, I =
check with=0ABerkeley at:
=0Ahttp://quake.geo.berkeley.edu/bdsn/make_seismogram.html
=0A
=0AIf you just create plot without setting time, it will create=
 todays=0Aseismogram for CMB... I use 4 for compression to get an hour per =
line; =0Aand pixels at 25 to get a little separation.  Sorry if I=
 am sharing old=0Ainfo...   if so, maybe it will help others? =0A
=0AIf you check the following ocean weather link you will see why..=
.. =0Athere are 20 to 25 foot waves off the NW USA coast.   E=
arlier, they=0Awere showing up to 30 foot waves. You can click on any box t=
o see the=0Aconditions in the box...  I click on the box that shows Al=
aska to below=0ABaja...   and yes, the energy is apparently comin=
g from 200 to 400=0Amiles away:
=0Ahttp://www.oceanweather.com/data/
=0A
=0AAt one time I had my ga=
in so high that noise like this would set off my=0Aalarm, (I have a separat=
e alarm, which I built before I had a computer=0Aand recording capability).=

=0A  Stephen
=0A  PSN Station #55
=0A  38.828N&nbs=
p; 120.979W
=0A  near Pilot Hill Calif   
=0A=0ABarry Lotz wrote:=0A
=0A  =0A    =0A      =0A        =
=0A      =0A    <=
/tbody>=0A  

=0ATo all=0ARelated to instrument quality- maybe. I have noticed a lot more=0Amicro=
seismic activity the last few days. The background noise on my=0Avertical i=
s around +/- 300 counts @  8.7 sec  and 6.6 sec  (two narrow=
=0Apeaks). I don't remember this magnitude in years past. I'm sure it is=0A=
weather related. I live about 200 miles east of the west coast of=0Anorther=
n California. Anyone else noticed an increase in background=0Alately? Every=
 time I look at the output I think I'm looking at surface=0Awaves after an =
event.
=0ABarry
=0A        
=0A        
=0A
=0A =0A