World Bulletin / News Desk
The United States Geological Survey said the quake's epicentre was 163 km (100 miles) north-northwest of Yunjinghong and 10 km deep.
Xinhua quoted a county official as saying houses shook for several seconds and some tiles fell off roofs while residents ran outside.
State radio previously said five people were killed and more than 20 injured.
Pictures on Xinhua's Weibo microblog showed smashed tiles and bricks on the ground in one village, with cracks in the walls of some of the low-rise houses.
The People's Daily said the county is home to about 300,000 people, most of them members of ethnic minorities.
More that 1,000 rescuers, including soldiers, were on their way to the scene, with tents, blankets and other relief materials, state television added.
About 600 people died in a 6.3 magnitude quake which hit another part of Yunnan in August.
Earthquakes frequently strike in the region. A quake in Sichuan province, also in the southwest, in 2008 killed almost 70,000 people.Last Mod: 08 Ekim 2014, 09:48