Hi Brett,

You might have been seeing the earthquake wave second passing around the
globe there.

This earthquake was big enough to go at least 2 - 3 times around the planet.

Regards,
Jón Frímann.

> Hi Jon,
>
> That's what I'm hoping someone knows more about than I do.  I posted a gif
> image of what we were seeing at:
>
> http://bnordgren.org/seismo/090929.215813.bhz-ph.psn.gif
>
> The peak amplitude appears to be about 1um/s.  Since at 180 seconds the 50
> sec. instrument response is down by a factor of roughly 13, the actual
> peak
> ground velocity must have been somewhere around 13um/sec implying a peak
> displacement of about 0.37 mm.
>
> Brett
>
>
>
> At 12:44 AM 9/30/2009 +0000, you wrote:
>>Hi,
>>
>>What was the signal that you where seeing ?
>>
>>Regards,
>>Jón Frímann.
>>
>> > Hi all,
>> >
>> > As the Samoa quake was winding down, at about 23:04 UCT on the 50 sec
>> > vertical we see a very clear ~180 second signal that lasts for about
>> half
>> > an hour.  On the Trillium 120 Z channel it's much bigger.  What's
>> going
>> > on?  Is that what I think it is?
>> >
>> > Brett
>> >
>
> Watch our wiggles
> http://bnordgren.org/seismo/gif_images.htm
>
> or watch some very very good wiggles
> http://aslwww.cr.usgs.gov/Seismic_Data/telemetry_data/ANMO_24hr.html
>
>
> __________________________________________________________
>
> 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
> See http://www.seismicnet.com/maillist.html for more information.
>


__________________________________________________________

Public Seismic Network Mailing List (PSN-L)