There is a good explanation and calculator on John Lahr's site
regards
Dale
http://www.jclahr.com/science/psn/damping/


----- Original Message ----- 
From: "Robert O. Green" 
To: 
Sent: Monday, February 23, 2009 3:31 AM
Subject: Optimal damping


> Is the graphic at this PSN website a good representation of an optimally 
> damped seismometer?
> 
> http://psn.quake.net/onlinedocs/sgdamp.html
> 


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