PSN-L Email List Message
Subject: Re: T wave
From: "David Saum" DSaum@............
Date: Tue, 21 Jul 2009 08:40:46 -0400 (EDT)
I also noticed that the M7.8 NZ quake showed up
strongly on my 4.5 Hz geophone, and when I looked
at the power spectra most of the energy appeared
to be above 1 Hz. In my previous large teleseismic
geophone detections my power spectra have shown peaks
around 0.02-0.04 Hz. Are T waves typically at
> ----- Original Message -----
> From: "Dale Hardy"
> To: "PSN"
> Sent: Sunday, July 19, 2009 4:43 PM
> Subject: T wave
> The recent M7.8 New Zealand EQ produced " T " waves which showed up very
> strongly on my geophone.
> "T" phase & is seen for big events - it is transmitted through the ocean
> water, rather than through the rock below - hence it is
> slower - only seen for events under oceans ( & probably have to be
> shallow as well)
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