Earthquakes in Oklahoma? Is 'Fracking' to Blame, or Something Else?

Earthquakes in Oklahoma? Rodgers and Hammerstein didn't see that one coming. Indeed, this week's temblors in the Sooner State highlight the challenge scientists face as they try to improve earthquake-hazard assessments in the central and eastern United States, particularly across the lower half of the country. In regions known for relatively frequent, large quakes, such as the west coasts of North and South America or deep in the heart of Turkey, sources of stress on faults are well known. And...Full Story
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