PSN-L Email List Message

Subject: Re: Unusual signal on Northern Cal. Seismometers
From: Stephen & Kathy skmort@............
Date: Mon, 16 Oct 2006 20:22:44 -0700


FYI,,   your seeing the surface waves from the New Britain quake!
On my system, east of Sacramento, they are approx. 18 seconds,,,  my 
system started recording the surface waves at approx. 02:08:22 UTC = 
19:08:22 PDT !
  Stephen
  PSN Station #55

kpayea@........... wrote:
> Hello All, especially those of you in Northern California.  The alarm 
> went off on my system a few minutes ago, and the signal on the screen 
> was very unusual.  It was a decent sized sine wave, about 20 second 
> period.  I thought it might be local, caused by heavy construction on 
> 101 nearby, but most of the Berkeley network instruments at 
> http://www.ncedc.org/bdsn/quicklook.html 
>   show the same 
> thing.  To my eye, this doesn't look like a normal EQ signal.  Or is 
> it just me?
>  
> The signal is still ringing down, after a good 25 minutes.
>  
> What do you all think?
>  
> Cheers,
>  
>  
>     /Keith/
>  
> Keith Payea
> Bryant Labs
> kpayea@.............. 
> www.bryantlabs.net 
> (707) 566-8935
>  



  
  


FYI,,   your seeing the surface waves from the New
Britain quake!
On my system, east of Sacramento, they are approx. 18 seconds,,,  my system started recording the surface waves at approx. 02:08:22 UTC = 19:08:22 PDT !
  Stephen
  PSN Station #55

kpayea@........... wrote:
Hello All, especially those of you in Northern California.  The alarm went off on my system a few minutes ago, and the signal on the screen was very unusual.  It was a decent sized sine wave, about 20 second period.  I thought it might be local, caused by heavy construction on 101 nearby, but most of the Berkeley network instruments at http://www.ncedc.org/bdsn/quicklook.html  show the same thing.  To my eye, this doesn't look like a normal EQ signal.  Or is it just me?
 
The signal is still ringing down, after a good 25 minutes.
 
What do you all think?
 
Cheers,
 
 
    Keith
 
Keith Payea
Bryant Labs
(707) 566-8935
 

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