People gathered in open areas after the quake hit.
The quake, which struck at 7:49 a.m. in Qinghai Province, bordering Tibet, had a magnitude of 7.1, according to China’s earthquake agency. At least 18 aftershocks measuring more than 6.0 followed throughout the day, government officials said, according to Xinhua.
China’s earthquake agency said the quake centered on Yushu County, a remote and mountainous area sparsely populated by farmers and herdsmen, most of them ethnic Tibetans. The region, pocked with copper, tin and coal mines, is also rich in natural gas.
As with the devastating earthquake two years ago that killed 87,000 in neighboring Sichuan Province, many buildings collapsed, including schools. But with Qinghai’s far smaller and less dense population, the toll is likely to remain far lower.
A seismologist, Gu Guohua, said in an interview with the national broadcaster CCTV that 90 percent of the homes in the county seat, Jeigu, had collapsed. The houses, he said, were of “quite poor quality,” with many constructed of wood, mud and brick.
The dead included at least 56 students and 5 teachers who were crushed in the rubble of collapsing schools or dormitories, the English-language government newspaper China Daily reported. Of that number, 22 students — 20 of them girls — died in the collapse of a vocational school, the newspaper quoted the deputy chief of the Yushu education bureau, Xiao Yuping, as saying.
Among those still missing were 20 children buried in the wreckage of a primary school, and as many as 50 people were trapped beneath a collapsed office building that houses the Departments of Commerce and Industry, according to news reports.
“We’re in the process of trying to rescue the students,” Kang Zifu, a local fire department official, told CCTV on Wednesday afternoon. “We’re hurrying to help them.”
He said at least 32 survivors had been pulled from the debris.
The prefecture that includes Yushu is on the Tibetan plateau, with a population that is more than 96 percent Tibetan and overwhelmingly poor. Many villages sit well above 16,000 feet, with freezing temperatures not uncommon in mid-April. By Wednesday evening, temperatures in the county seat had already dropped to 27 degrees, and snow and sleet were forecast in the coming days.
“The most important thing now is that this place is far from everything, with few accessible rescue troops available,” Mr. Wu said. “I feel like the number of dead and injured will keep going up.”
Officials said that rescue efforts were stymied by a lack of heavy equipment. Medical supplies and tents, they added, were in short supply. Phone calls to local government offices went unanswered Wednesday afternoon.
State news media reported that 700 paramilitary officers were already working in the quake zone and that more than 4,000 others would be sent to assist in search and rescue efforts. The Civil Affairs Ministry said it would also send 5,000 tents and 100,000 coats and blankets.
Workers also were rushing to release water from a reservoir after cracks were discovered in a dam, according to the China Earthquake Administration.
Genqiu Renqin, a teacher who lives in Sichuan Province, about 60 miles from Yushu, said he felt the earth shake and immediately drove to see if relatives who lived near the epicenter were safe.
“Almost all of their homes were badly damaged, but luckily no one was seriously injured,” he said, speaking by phone from a town about 25 miles from the county seat. “All the people in the area are camping out for now.
