A technician debugs devices at the unmanned earthquake monitor in Tingri County, southwest China's Tibet Autonomous Region, October 17, 2009. China's first unmanned earthquake monitor has been established and put into use at 4255 meters above sea level on Mt. Qomolangma. [Xinhua]

A technician debugs devices at the unmanned earthquake monitor in Tingri County, southwest China's Tibet Autonomous Region, October 17, 2009. [Xinhua]