A major earthquake at magnitude 7.2 hit China on Thursday afternoon according to the United States Geological Survey. There were no immediate report of deaths or injuries. The quake, which occurred 20 miles below the Earth's surface, hit the border area of western China's Xinjiang and Xizang regions. The United States Geological Survey considers earthquakes between 7.0 and 7.9 to be "major" earthquakes. The temblor was followed about 45 minutes later by a magnitude 5.5 aftershock. More details will be forthcoming Friday morning.