Two earthquakes that occurred over three minutes rattled two counties Wednesday in Yaan, Southwest China’s Sichuan province, triggering rockslides and causing at least four deaths and 41 injuries. Photo: VCG

Boulders blocked a road in Yaan’s Lushan county after the quake. The first quake, measuring 6.1 on the Richter scale, occurred at 5 p.m. at a depth of 17 kilometers in Lushan. Three minutes later, a second, 4.5-magnitude quake hit nearby Baoxing county at a depth of 18 kilometers. Photo: VCG

As of 10 a.m. Thursday, the earthquake had damaged over 4,500 homes, according to a China National Radio report. Photo: VCG

Relocated people sleep in a temporary shelter that was set up in a middle school in Taiping town of Lushan county at 10 p.m. Wednesday. Photo: An Yuan, China News Service/VCG

A disease control worker sprays disinfectant Wednesday at the temporary shelter in Lushan county. Photo: An Yuan, China News Service/VCG

Affected residents from Baoxing county get relocated to a temporary shelter at a middle school Wednesday. Photo: VCG

Rescuers set up tents for affected residents at the shelter in Baoxing county. Photo: VCG

An overview of the shelter in Lushan county. In 2013, the area was hit by a 7.0-magnitude earthquake, which killed 196 and injured more than 11,000. Photo: VCG