"Jim and Connie Lehman"  writes:

> Steinar--an interesting observation at 8200 km--Let's chalk it up to
> half plausible, and half imagination.  This event is a powerful
> exhibit of energy, and it will be interesting to see reports of motion
> exhibited or detected by conditions other than seismographs.

By extrapolating http://jclahr.com/science/psn/magnitude.html we
should expect about 2 cm (!) ground movement at this distance, but I
expect that this would be longer periods than what my Lehman was
designed for.

While my observation might be plausible I'm actually more impressed
with what I saw on my 4.5 Hz geophones.  Here's what I get if I apply
a 1 Hz lowpass filter to the N-S geophone:

http://voksenlia.net/nytt/2011/jordskjelv-20110311.jpg

And here's the raw unfiltered seismometer plot:

http://voksenlia.net/nytt/2011/jordskjelv-20110311b.jpg

It's badly clipped, so it's less useful to study.

-- 
Steinar
__________________________________________________________

Public Seismic Network Mailing List (PSNLIST)

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