PSN-L Email List Message

Subject: Earthquake or not....
From: Thomas Dick dickthomas01@.............
Date: Mon, 10 Dec 2012 10:53:28 -0600


With the holidays and all, this is not the best time of year to bring 
this up but maybe somebody who knows is listening. ...so here goes. The 
basic question is when is an earthquake an earthquake. I have been 
around long enough that I recognize/ignore mine blasting. And should I  
also ignore fracking? Well water removal? Injection well activity? What 
about this 
http://theadvocate.com/home/4538683-125/assumption-sinkhole-burps-vegetation-hydrocarbons? 
I believe that earthquakes are defined as the reduction of stress along 
breaks/faults in the crust. Isn't that what is happening in almost all 
of these cases? Does it really matter than man caused these? Is it the 
size? Isn't the activity  just as scientifically important as truly 
"real" minor earthquakes like those along the New Madrid and San Andes 
fault?
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