Oklahoma has an earthquake catalog for each year: http://www.okgeosurvey1.gov/pages/earthquakes/catalogs.php http://www.okgeosurvey1.gov/pages/earthquakes/catal

Oklahoma has an earthquake catalog for each year: http://www.okgeosurvey1.gov/pages/earthquakes/catalogs.php http://www.okgeosurvey1.gov/pages/earthquakes/catalogs.php I picked a random year (pre-fracking): 1989. There were 62 quakes with magnitudes between 1.7 and 3.1. Now lets pick a year with fracking: 2014. There were 5417 quakes with magnitudes between ~1 and 4.4. (Edit: for comparison purposes: 4923 were at 1.7 or above.) 13 out of 20 of the largest earthquakes since 1897 have been in the past 5 years. http://www.okgeosurvey1.gov/pages/earthquakes/information.php#FAQ" http://www.okgeosurvey1.gov/pages/earthquakes/information.ph... So no oil company is going to make that argument.. because there's no evidence it reduces the likelihood of larger quakes.. and people would start asking questions about why they're causing thousands of quakes each year (not to mention the liability).