The China Earthquake Networks Center says that a 6.8-magnitude earthquake hit a hilly area in the western Sichuan province of China around noon on Monday.
The centre said that the epicentre was 16 km deep in the town of Luding, which is 180 km (111 mi) southwest of Chengdu, which is the capital of Sichuan.
People on the Internet said they felt the quake in Sichuan from as far away as Changsha and Xian.
The centre says that just a few minutes later, a second quake with a magnitude of 4.2 happened near Luding in the city of Yaan.
So far, there have been no deaths that have been reported.
In 2013, a strong earthquake hit Yaan. It killed more than 100 people and hurt thousands more.
