Hi Chris,

Well, I'm willing to believe that they are real.  As in real strange, 
but not as in real seismic.  When you expand the data to the point that 
you can see the waveform, or listen to the time compressed audio, they 
are clearly not quake sounds.

I didn't really expect anyone to come up with an unambiguous 
identification.  It was more in the line of "look at the strange thing I 
found in my data".

Larry


>      This is NOT the response of a heavily damped filter to a transient pulse !!
> Checkhttp://neic.usgs.gov/neis/travel_times/ttgraph.html  for maybe 90 to 100
> degrees. There are several S wave variants, so the signals could be real.
> .
>      Regards,
>      Chris Chapman
>   

  
    
  
  
    

    Hi Chris,

            

            Well, I'm willing to believe that they are real.  As in real
            strange, but not as in real seismic.  When you expand the
            data to the point that you can see the waveform, or listen
            to the time compressed audio, they are clearly not quake
            sounds.

            

            I didn't really expect anyone to come up with an unambiguous
            identification.  It was more in the line of "look at the
            strange thing I found in my data".  

            

            Larry

            

            

          
    

        

          

              

                

                    

                      

                        
    This is NOT the response of a heavily damped filter to a transient pulse !! 
                        
Check http://neic.usgs.gov/neis/travel_times/ttgraph.html for maybe 90 to 100 
                        
degrees. There are several S wave variants, so the signals could be real.
                        
.
                        
    Regards,
                        
    Chris Chapman