[ARRL-OK] [OCAPA] Earthquake - 13 Oct 2010

[ClayMayrose at aol.com]

Greetings All,
 
Being a Six-lander I am somewhat familiar with the ground shaking beneath  
my feet...4.7?  Heck that is two Semi's speeding down I-40 side by  side. I 
was in the Philippines for the 8.8 in April of 1990 (I think) that  was a 
real crowd pleaser.
 
If anyone is interested in building a very crude and inexpensive  
seismograph. Drop me an email and I will explain the workings.  We used  these in 
California in the 80's and typically had the epicenter with in a  mile and 
usually a little faster than CalTech. Uses the same principles  as RDF.
 
Clay WA6LBU