A magnitude-3.7 earthquake hit central Oklahoma early Monday, the U.S. Geological Survey reported after several similar small tremors rocked the oil-rich state last week. The USGS recorded the tremor near Fairview, Okla., around 3 a.m. Monday local time. A magnitude-3.2 quake struck near the border of Kansas late Sunday. According to the Oklahoma Geological Survey at the University of Oklahoma, there were more than a dozen tremors recorded in the region since Friday. A March report from the USGS found central U.S. states have experienced a dramatic increase in seismic activity over the past six years. The report said the disposal of oil and […]