PSN-L Email List Message

Subject: PSN - Increase in noise
From: "Rex Klopfenstein, Jr" rklopfen@.........
Date: Mon, 30 Aug 1999 13:43:42 -0400


I have two S-G seisms running and everything was fine.  I had the
amplifiers adjusted to display about +/-100 counts of background noise.
Sunday (8/29/99) I turned on the monitor on my SDR computer.  All
channels (HI/LO on both N/S and E/W) are somewhat more noisy.  The
average values are now about +/-300 to 400 counts.

I retrieved a block of data from my N/S channel during a quiet time
(2:00am LOCAL).  I then switched to the FFT screen and noted a peak at
0.12 on LOG(f) scale (x axis).  I assume that the scale is log base 10
of frequency or 0.12 = approx 1.3 Hz??

Would this increase in noise be caused by the hurricane on the East
Coast (I am located in NW Ohio).  I remember seeing something on this
list sometime ago, but can't remember if there was a characteristic
frequency of this hurricane noise.

If the hurricane isn't doing it, it's time for some detective work!!

Any help would appreciated before I start looking for gremlins!!!
--
Rex Klopfentein, Jr.
rklopfen@.........
http://www.wcnet.org/~rklopfen



_____________________________________________________________________

Public Seismic Network Mailing List (PSN-L)


[ Top ] [ Back ] [ Home Page ]

Larry Cochrane <cochrane@..............>