A strong 6.3 magnitude quake struck early Monday in China's western Xizang province, its name for Tibet, the US Geological Survey reported. The quake struck in a sparsely populated area at 2007 GMT Monday, the USGS said. Its epicentre was nearly 600 kilometers (350 miles) northeast of Llasa at a shallow depth of 10 kilometers, according to USGS data. There were no immediate reports of casualties. ch/dw