1 on the Richter scale, three centred in Yao'an and the other five centred in the neighbouring Dayao County.
The latest aftershock occurred at 11.09 p.m. in Yao'an.
Tents, medicines and food were distributed to residents in Guantun township.
Residents of Yao'an county seat, about 16 km from Guantun, gathered outdoors fearing more aftershocks.
Strong tremors were felt in Chuxiong, Lijiang City, Kunming and Dali Bai Autonomous Prefecture.
Two teams, one headed by the Yunnan Governor Qin Guangrong, and another from the Ministry of Civil Affairs, the National Commission for Disaster Reduction and China Earthquake Administration, rushed to the site.