PSN-L Email List Message
Subject: Re: Recording Micro Quakes
From: ChrisAtUpw@.......
Date: Sun, 19 Feb 2006 11:07:29 EST
=20
In a message dated 19/02/2006, 1goss@........... writes:
Thanks for all the reply=E2=80=99s. I don=E2=80=99t have 3,000 for a geopho=
ne laying=20
around, so I will shorten the period on one of my Lehman=E2=80=99s to see h=
ow well It can=20
record local events.=20
Thanks again Bryan S Goss
Hi Bryan,
=20
No! This is not necessary and it will actually REDUCE the output, since=
=20
you will have to increase the damping. For local events you need to look at=
P=20
& S freqencies well over 1 Hz. I expect that your amplifier will roll off a=
t=20
10 Hz. Just use Winquake to set the upper and lower frequencies displayed.
=20
Regards,
=20
Chris Chapman
In a message dated 19/02/2006, 1goss@........... writes:
<=
FONT=20
style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size=
=3D2>Thanks=20
for all the reply=E2=80=99s. I don=E2=80=99t have 3,000 for a geophone lay=
ing around, so I=20
will shorten the period on one of my Lehman=E2=80=99s to see how well It c=
an record=20
local events.
Thanks again Bryan S Goss
=
Hi Bryan,
No! This is not necessary and it will actually=20
REDUCE the output, since you will have to increase the damping. For local ev=
ents=20
you need to look at P & S freqencies well over 1 Hz. I expect that your=20
amplifier will roll off at 10 Hz. Just use Winquake to set the upper and low=
er=20
frequencies displayed.
Regards,
Chris Chapman
[ Top ]
[ Back ]
[ Home Page ]