Spreading losses are the square of the distance so long as
the spreading is 3D.

There are other losses also.

Several in fact.

But it boils down to the generation of heat
which is lost to entropy forever.

It was so long ago that
I studied this in SONAR
and can no longer remember
everything.

Regards;
geoff

----- Original Message ----- 
From: "Bob Hancock" 
To: "'PSN'" 
Sent: Monday, October 23, 2006 6:14 PM
Subject: Dissipation of Seismic Waves


> Hi All -
> 
> 
> 
> I believe that the intensity of light drops by the square of the distance
> i.e., double the distance and the new value is the square root of the
> distance.  How does this apply to seismic waves which are basically sound
> waves?  In addition, how does this affect the amplitude and radiated seismic
> energy of the waves?  
> 
> 
> 
> Bob Hancock
> 
>
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