[Skywise]

Hi Chris,

Here's a breakdown of the number of quakes per year, since 1980.

35.9N, 97.25W, 500km radius - it picks up a 4.5 in Arkansas and it's aftershocks in 1982.

The activity starts picking up in 2009, about the time that fracking started picking up. Not proof, but certainly strong evidence.

Code:

year - all - 3+
1981 - 4   - 3
1982 - 30  - 25 - 4.5 in arkansas
1983 - 6   - 2
1984 - 8   - 3
1985 - 6   - 3
1986 - 29  - 4
1987 - 22  - 2
1988 - 23  - 3
1989 - 10  - 4
1990 - 5   - 1
1991 - 2   - 2
1992 - 17  - 3
1993 - 3   - 1
1994 - 2   - 1
1995 - 7   - 4
1996 - 4   - 2
1997 - 7   - 5
1998 - 5   - 4
1999 - 4   - 3
2000 - 10  - 7
2001 - 7   - 4
2002 - 10  - 4
2003 - 9   - 2
2004 - 5   - 2
2005 - 5   - 5
2006 - 14  - 5
2007 - 12  - 5
2008 - 35  - 6
2009 - 78  - 22
2010 - 219 - 62
2011 - 373 - 121
2012 - 127 - 41
2013 - 507 - 114
2014 - 320 - 95 - in only 3 months!!

Brian