The magnitude 6.5 quake struck a mountainous region near a national park that is one of the China's top tourist attractions. Another 121 aftershocks were recorded as of 1pm, with the greatest exceeding 6.0-magnitude. She added that the damage in the town center seemed minimal other than the suspension of electricity.
The dead included eight tourists, two residents and nine whose identities have yet to be confirmed, state television said.
Jiuzhaigou is a popular tourist destination that holds the the Jiuzhaigou Nature Reserve - parts of which were damaged by Tuesday's quake. Many tourists were left stranded at the airport.
The Sichuan government said rescuers were gradually evacuating tourists and residents who had been cut off by landslides.
Meanwhile, Malaysian Chinese Tourism Association deputy president Jackson Thian said the quake has not affected China-bound Malaysian tourists very much as August is not the peak season for Malaysians to visit Jiuzhaigou.
More than 500 medical staff have been dispatched to the disaster zone, provincial official Qumushiha said at a press conference Thursday evening. Relief agencies - the Red Cross Society of China and Save the Children - have been mobilising teams to rescue people with several highways and roads still blocked along the disaster-hit region.
It's not unusual for magnitude and depth readings to vary due to different technologies in use and the timing and distance from where quakes are measured. The Chinese Red Cross Foundation has sent work teams to verify the casualties and damage, and has allocated 100,000 yuan (over 14,914 USA dollars) for emergency aid.
The landslide resulted in the deaths of at least 23 people and destroyed more than 70 homes.
The quake hit about 2,200 kilometers (1,360 miles) northwest of another quake Tuesday night in Sichuan province that officials say killed seven people and injured dozens of others.
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