Environmental advocacy group Sierra Club said it filed a lawsuit against energy companies involved in Oklahoma shale in part because of the rise of earthquakes. The U.S. Geological Survey reported five tremors of magnitude-3.1 or less early Wednesday. That follows the steady string of minor quakes that followed a magnitude-5.1 earthquake recorded Saturday near Fairview, about 100 miles north of Oklahoma City. The USGS reported last year the increase in seismic activity in Oklahoma since 2009 may be in part related to activity associated with oil production . The agency said the disposal by the energy industry of wastewater in deep underground wells is potentially leading to more earthquakes. The Sierra Club and Public Justice filed […]