PSN-L Email List Message
Subject: Re: Seismometer Siting
From: ChrisAtUpw@.......
Date: Tue, 29 Sep 2009 00:19:48 EDT
In a message dated 29/09/2009, barry_lotz@............. writes:
Geoff
Along that line, a P wave being a pressure wave and a s wave being a shear
wave. It seems that if one could see two directions simultaneously during
an event one be able to combine the p wave vectors and obtain the direction
of max and min p wave contribution and thus the approx direction of the
event.
Hi Barry,
The P wave comes up at quite a steep angle and it is rather weak, so
this is not such a good idea. But you have horizontal S waves which carry
the direction of propagation very well and are usually much stronger. Two
horizontal sensors should work fine.
Regards,
Chris Chapman
In a message dated 29/09/2009, barry_lotz@............. writes:
Geoff Along that line, a P wave being a pressure=
wave=20
and a s wave being a shear wave. It seems that if one could see tw=
o=20
directions simultaneously during an event one be able to combine=
the p=20
wave vectors and obtain the direction of max and min p wave contri=
bution=20
and thus the approx direction of the=20
event. |
Hi Barry,
The P wave comes up at quite a steep angle an=
d it=20
is rather weak, so this is not such a good idea. But you have horizontal=
S waves=20
which carry the direction of propagation very well and are usually much=20
stronger. Two horizontal sensors should work fine.
Regards,
Chris Chapman
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