Bryan, you are asking question that are not simple to explain.  BUT, =
there is tons of information on the internet!  Go to this site ( =
http://bingweb.binghamton.edu/~ajones/ ) and choose the =E2=80=9CSeismic =
=E2=80=93 Waves.=E2=80=9D  This has a very good description of the =
different wave action that may be propagated from an earthquake.

You questions are GOOD, but simple to answer in some cases.  Keep them =
up!  Chris Chapman is our =E2=80=9Cofficial=E2=80=9D guru and always =
listen to his advice.  THAT is not to ignore others on the site.  Many =
have educational and experience to help.

Regards,
Jerry


From: Bryan Mumford=20
Sent: Saturday, March 12, 2011 10:59 AM
To: psnlist@.................
Subject: RE: clock pendulums

I've seen earthquakes stop my clock pendulums. Presumably this is=20
because they shifted the ground in the direction the pendulum was=20
swinging. A clock at 90 degrees to the one that stalled kept running.

The quake in Japan was too far away to have such an effect, but I'm=20
thinking about the kind of motion the earthquake is likely to deliver=20
from so far away. Will it be an up and down motion?

Is this a difference between P and S waves? Would it be a vertical P=20
wave from Japan, and a lateral S wave from a closer quake that might=20
stall a clock pendulum?

--=20

Bryan Mumford
__________________________________________________________

Public Seismic Network Mailing List (PSNLIST)

To leave this list email PSNLIST-REQUEST@.............. with=20
the body of the message (first line only): unsubscribe
See http://www.seismicnet.com/maillist.html for more information.




Bryan, you are asking question that are not simple to =
explain.  BUT,=20
there is tons of information on the internet!  Go to this site ( http://bingweb.binghamton=
..edu/~ajones/=20
) and choose the =E2=80=9CSeismic =E2=80=93 Waves.=E2=80=9D  This =
has a very good description of=20
the different wave action that may be propagated from an =
earthquake.
 
You questions are GOOD, but simple to answer in some cases.  =
Keep them=20
up!  Chris Chapman is our =E2=80=9Cofficial=E2=80=9D guru and =
always listen to his=20
advice.  THAT is not to ignore others on the site.  Many have=20
educational and experience to help.
 
Regards,
Jerry
 


 

From: Bryan Mumford 
Sent: Saturday, March 12, 2011 10:59 AM
To: psnlist@.............. 
Subject: RE: clock pendulums
 
I've=20
seen earthquakes stop my clock pendulums. Presumably this is 
because =
they=20
shifted the ground in the direction the pendulum was 
swinging. A =
clock at 90=20
degrees to the one that stalled kept running.

The quake in Japan =
was too=20
far away to have such an effect, but I'm 
thinking about the kind of =
motion=20
the earthquake is likely to deliver 
from so far away. Will it be an =
up and=20
down motion?

Is this a difference between P and S waves? Would it =
be a=20
vertical P 
wave from Japan, and a lateral S wave from a closer quake =
that=20
might 
stall a clock pendulum?

-- 

Bryan=20
Mumford
__________________________________________________________
=

Public=20
Seismic Network Mailing List (PSNLIST)

To leave this list email=20
PSNLIST-REQUEST@.............. with 
the body of the message (first =
line=20
only): unsubscribe
See http://www.seismicnet.com/maillist.html for =
more=20
information.