Geoffrey
I've also noticed this for quite some time. I thought it was my sensors. Maybe not.
Regards
Barry


--- On Wed, 9/2/09, Geoffrey  wrote:

From: Geoffrey 
Subject: ARRIVAL TIMES: Quiet Before The Storm
To: "PSN-LIST" 
Date: Wednesday, September 2, 2009, 5:50 PM

I have noticed in some Earthquakes you seem to notice
a short increase in quietness just before the impulse arrives.

Is this a real phenomena or simply a coincidence ?

Does this mean the real arrival time is
the beginning of the noticeable quiet ?

WHY THE QUIET ??
What physics would possibly muffle the noise ?

arrival of Possibly eP instead of simply P ?

Also,

What is the preferred format for a PSN files data ?
FLOAT or INTEGER
16 bit or 32 ?

My data is all 8 bit So should I expand it to
meet the new format ?

Comments ?

geoff
__________________________________________________________

Public Seismic Network Mailing List (PSN-L)

Geoffrey
I've also noticed this for quite some time. I thought it was my sensors. Maybe not.
Regards
Barry


--- On Wed, 9/2/09, Geoffrey <gmvoeth@...........> wrote:

From: Geoffrey <gmvoeth@...........>
Subject: ARRIVAL TIMES: Quiet Before The Storm
To: "PSN-LIST" <psn-l@..............>
Date: Wednesday, September 2, 2009, 5:50 PM

I have noticed in some Earthquakes you seem to notice
a short increase in quietness just before the impulse arrives.

Is this a real phenomena or simply a coincidence ?

Does this mean the real arrival time is
the beginning of the noticeable quiet ?

WHY THE QUIET ??
What physics would possibly muffle the noise

[ Top ] 
[ Back ] 
[ Home Page ]