Hi Geoff-
Interesting as water does not support shear waves, only P- so that accou=
nts for the 1 thump.
There is a low velocity layer (LVL) in the ocean called the SOFAR layer =
which traps P waves so they are channeled for long distances. Nice plac=
e for a sub to hide I would imagine. The LVL causes the waves to be re=
fracted down then back up so they are trapped.
See- http://www.whoi.edu/oceanus/viewArticle.do?id=3D2492
Jim
Jim O'Donnell =
Geological/Geophysical Consultant
GEOTECHNICAL APPLICATIONS
702.293.5664 geophysics@..........
702.281.9081 cell jimo17@........
-- "Geoff" wrote:
Once Aboard Ship i felt an EQ
that at first I belived to be a collision
of some kind, I waited for an alarm that
never came. It was not till I heard on the radio
that we just had an EQ I think in Long Beach Ca.
Back in the 1970s.
I bet they feel EQs in the middle of the ocean
even aboard Submarines.
These EQs can and do feel like a single thump.
Regards
geoff
----- Original Message ----- =
From: "Pete Rowe"
To:
Sent: Friday, December 21, 2007 8:26 AM
Subject: 3.1 in San Jose
> The 3.1 at 12:14 utc was about 9 miles from me. It
> woke me up with a thud.
> My seismometer is now up on my website: www.rowelabs
> DOT com.
> Pete
> =
> =
> _________________________________________________________________=
___________________
> Never miss a thing. Make Yahoo your home page. =
> http://www.yahoo.com/r/hs
> __________________________________________________________
> =
> Public Seismic Network Mailing List (PSN-L)
> =
> To leave this list email PSN-L-REQUEST@.............. with =
> the body of the message (first line only): unsubscribe
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__________________________________________________________
Public Seismic Network Mailing List (PSN-L)
See http://www.seismicnet.com/maillist.html for more information.
Hi Geoff-
Interesting as water does not support shear waves,=
only P- so that accounts for the 1 thump.
There is a low velocity la=
yer (LVL) in the ocean called the SOFAR layer which traps P waves s=
o they are channeled for long distances. Nice place for a sub to h=
ide I would imagine. The LVL causes the waves to be refracte=
d down then back up so they are trapped.
See- http://www.whoi.edu/oceanus/viewArticle.do?id=3D2492
Jim
&=
nbsp; Jim O'Donnell =
;
Geological/Ge=
ophysical Consultant
=
GEOTECHNICAL APPLICATIONS
702.293.5664 =
geophysics@..........
702.281.9081 cell jimo17@juno=
..com
-- "Geoff" <gmvoeth@...........> wrote:
Once Aboard=
Ship i felt an EQ
that at first I belived to be a collision
of so=
me kind, I waited for an alarm that
never came. It was not till I hea=
rd on the radio
that we just had an EQ I think in Long Beach Ca.
B=
ack in the 1970s.
I bet they feel EQs in the middle of the ocean<=
BR>even aboard Submarines.
These EQs can and do feel like a singl=
e thump.
Regards
geoff
----- Original Message ----- From: "Pete Rowe" <ptrowe@.........>
To: <psn-l@............
com>
Sent: Friday, December 21, 2007 8:26 AM
Subject: 3.1 in Sa=
n Jose
> The 3.1 at 12:14 utc was about 9 miles from me. I=
t
> woke me up with a thud.
> My seismometer is now up on my=
website: www.rowelabs
> DOT com.
> Pete
>
> > ___________________________________=
_________________________________________________
> Never miss a t=
hing. Make Yahoo your home page.
> http://www.yahoo.com/r/h=
s
> __________________________________________________________
=
>
> Public Seismic Network Mailing List (PSN-L)
>
&g=
t; To leave this list email PSN-L-REQUEST@.............. with
> t=
he body of the message (first line only): unsubscribe
> See http:/=
/www.seismicnet.com/maillist.html for more information.
_____________=
_____________________________________________
Public Seismic Netw=
ork Mailing List (PSN-L)
To leave this list email PSN-L-REQUEST@S=
EISMICNET.COM with
the body of the message (first line only): unsubs=
cribe
See http://www.seismicnet.com/maillist.html for more informatio=
n.