On 12/31/2012 11:32 AM, Tangazazen@....... wrote:
> Hi Geoff,
> Curiously enough I was interested at one time in a omni directional 
> seismometer but also wanted directional information. What I ended up 
> with was a pendulum with 2 degrees of freedom which via a quadrant 
> photo cell resolved the N-S,  E-W  component independently.
> As my wife’s family is in Japan I am on permanent earthquake watch for 
> anything from there.  If the first responses are identical in 
> amplitude and both of the same polarity I know the quake  is on the 
> N-E  S-W axis. The time interval between the P and the S give of 
> course the distance and being based in England,  I have a choice of 
> ether the middle of South America or of the east coast of Japan. Any 
> thing over M6.5 and my wife is straight on the phone to Japan.
> Regards Martin
> All the best for the new year.
I like the photocell idea
also i guess i might try a
CdS photo resistive element.

Thanks for the feedback.

Right now i hear occasional fireworks.
Its like 2335 local time MST or UTC -7hrs
We are near the last to see new years in the usa.

Its funny, here in Arizona, a store might sell
fireworks but, is illegal to use what you buy
within the same town.

Only the mildest of fireworks are legal here
unless you are blasters working for the mines
in Globe or Miami AZ.
I think, people who blast are licensed to do so.

Happy 2013,
geoff




  
    
  
  
    
On 12/31/2012 11:32 AM,
      Tangazazen@....... wrote:

    
    

      
      
      
        
Hi Geoff,
        
 
        
Curiously enough I was interested at one time in a omni
          directional seismometer but also wanted directional
          information. What I ended up with was a pendulum with 2
          degrees of freedom which via a quadrant photo cell resolved 
          the N-S,  E-W  component independently. 

        
        
As my wife’s family is in Japan I am on permanent
          earthquake watch for anything from there.  If the first
          responses are identical in amplitude and both of the same
          polarity I know the quake  is on the N-E  S-W axis. The time
          interval between the P and the S give of course the distance
          and being based in England,  I have a choice of ether the
          middle of South America or of the east coast of Japan. Any
          thing over M6.5 and my wife is straight on the phone to Japan.

        
        
Regards Martin
        
 
        
 
        
All the best for the new year.
      
    
    I like the photocell idea

    also i guess i might try a

    CdS photo resistive element.

    

    Thanks for the feedback.

    

    Right now i hear occasional fireworks.

    Its like 2335 local time MST or UTC -7hrs

    We are near the last to see new years in the usa.

    

    Its funny, here in Arizona, a store might sell

    fireworks but, is illegal to use what you buy

    within the same town.

    

    Only the mildest of fireworks are legal here

    unless you are blasters working for the mines

    in Globe or Miami AZ.

    I think, people who blast are licensed to do so.

    

    Happy 2013,

    geoff