OKLAHOMA CITY (AP) — The U.S. Geological Survey says a magnitude-5.1 earthquake that shook northwestern Oklahoma yesterday (SAT) was felt in Kansas and six other states. It was the third-strongest quake ever recorded in the state, where the power and frequency of earthquakes has dramatically increased in recent years. The USGS says the earthquake centered about 17 miles north of Fairview in northwestern Oklahoma occurred at 11:07 a.m. and was reportedly felt across Arkansas, Iowa, Kansas, Missouri, Nebraska, New Mexico and Texas. At least 10 smaller quakes ranging in magnitude from 2.5 to 3.9 were recorded in the same area by late yesterday (SAT) afternoon, including a magnitude 3.1 quake near Crescent, about 75 miles east of Fairview. There are no reports of injuries or significant damage. Oklahoma's stronger and more frequent earthquakes have been linked to the injection into the ground of the briny wastewater left over from oil and gas production.