PSN-L Email List Message

Subject: Re: Unusual signal on Northern Cal. Seismometers
From: Stephen & Kathy skmort@............
Date: Mon, 16 Oct 2006 21:05:52 -0700


If you have a software alarm, others will have to help,,,   I have a 
hardware alarm which monitors the input to the A/D and is adjusted right 
at the largest of the storm wave energy we get along the N. Cal coast!
  Stephen
  PSN Station #55

Pete Rowe wrote:
> I recorded the signal here in San Jose but my alarm
> didn't go off. I don't think I have the trigger
> paramenters set correctly. Any suggestions for setting
> the trigger level?
> Pete
>
> --- Stephen & Kathy  wrote:
>
>   
>> 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
>>>  
>>>       
>
>
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>   



  


If you have a software alarm, others will have to
help,,,   I have a hardware alarm which monitors the input to the A/D
and is adjusted right at the largest of the storm wave energy we get
along the N. Cal coast!
  Stephen
  PSN Station #55

Pete Rowe wrote:
I recorded the signal here in San Jose but my alarm
didn't go off. I don't think I have the trigger
paramenters set correctly. Any suggestions for setting
the trigger level?
Pete

--- Stephen & Kathy <skmort@............> wrote:

  
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 

      
<BLOCKED::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@..............
      
<mailto:kpayea@..............>
    
www.bryantlabs.net <http://www.bryantlabs.net/>
(707) 566-8935
 
      


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