The epicenter of the quake was in Zadoi County, Yushu Tibetan Autonomous Prefecture with a depth of 9 km. It was monitored at 32.81 degrees north latitude and 94.93 degrees east longitude.

No casualties have been reported so far, said local police. An emergency response has been activated.

The quake was strongly felt in the county seat, said Li Lianfu, an official with the Zadoi Earthquake Administration. All schools in Zadoi suspended classes and students were evacuated to playgrounds following the quake, he added.

Local authorities are still investigating the extent of the quake damage.

Yushu was hit by a 7.1-magnitude earthquake on April 14, 2010, which left nearly 3,000 people dead or missing.