PSN-L Email List Message

Subject: Re: Would Any Of Yous Guts Believe This ?
From: Thomas Dick dickthomas01@.............
Date: Sat, 01 Aug 2009 13:56:57 -0500

Brett Nordgren wrote:
> Thomas and Geoff,
> Although we go up to 30Hz, the background noise in the area usually 
> obliterates any small higher-frequency phases.
> I don't think we were seeing anything but surface waves from the 
> Honshu quake.  But......  with a10 second LoPass filter your recent 
> Pacific 5.2 at 108 degrees from LA did show a clearly visible Pdiff 
> and then about 18 minutes of various body phases which I don't have 
> the experience to identify, followed by some big surface waves.
> What does your noise level look like, Thomas?
> Brett
> At 09:36 AM 8/1/2009 -0500, you wrote:
>> Geoffrey wrote:
>>> Hello All you Happy face PSN folks;
>>> I think I just received a pP signal
>>> from a 5.0 Japanese quake with
>>> my SPZ sensor and I'm over
>>> 80 deg away.
>> I am at 92 degrees. Yes lots of noise. Not doing audio but on the 
>> vertical could the pP actually be a PcP or P? And did you get a peak 
>> at the arrival (sharp peak) of SS and LQ ... could the complex of 
>> waves at the arrival of S be due to the depth of the quake ... to a 
>> lesser extent, there are peaks on the E-W Lehman but not the N-S.
> quieter than it has been for seven days


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