Associated Press: Small earthquakes shaking Oklahoma and southern Kansas daily and linked to energy drilling dramatically are increasing the chance of bigger and dangerous quakes, federal research indicates.
This once-stable region now is just as likely to see serious damaging and potentially harmful earthquakes as the highest risk places east of the Rockies such as New Madrid, Missouri, and Charleston, South Carolina, which had major quakes in the last two centuries.
Still, its a low risk, about a 1 in 2,500...