Earthquake rattles Oklahoma oil hub

Officials in Cushing, Okla., say as many as 50 buildings in the key oil hub suffered “substantial damage” after a 5.0 earthquake rattled the area Sunday night. Residents reported no major injuries. But police blocked off older parts of town, where visible cracks fissured buildings and bricks crumbled from facades. The local school district canceled classes, and an area retirement home evacuated residents. Sunday’s temblor was the third to strike central Oklahoma this year with a magnitude of 5.0 or more. Geologists blame the shaking on underground injection of wastewater left over from oil and gas production. About two dozen smaller quakes have shaken the state in the past week. Cushing is home to one of the world’s largest oil storage terminals. As of Oct. 28, area tank farms held 58.5 million barrels of crude oil. None reported any damage from the quake.

The Associated Press contributed to this report.