I will bet  a can of navy beans that no passive device will show relative movement that is as much as the ground really moves.

----- Original Message ----- 
From: "Ted Channel" 
To: "psn" 
Sent: Wednesday, December 09, 2009 12:53 PM
Subject: displacement


Hi Folks,  Some while back I saw a graph showing how much a pendulum moved during an earthquake.   I am not sure if it was shown in 
nanometer.  Could someone direct me to it again?
Thanks, Ted 


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