EcoWatch: Oklahoma has had a whole lot of shaking going on during the last six years. Seismic activity in the state has risen dramatically, from just more than a dozen earthquakes recorded back in 2008 to more than 100 in 2013. And here we are only halfway through 2014, and already the number of Oklahoma quakes with a magnitude of 3.0 or higher has surpassed the number of such earthquakes in California--a state famous for its big temblors.
What on Earth (or under it) could be causing the Sooner State to...