"The system was not designed to predict earthquakes," said Wang Tun, director of Care-Life. "It uses the theory that radio waves travel faster than seismic waves and provides automatic warnings seconds before quake waves arrive."
Earthquake research has found that being aware of an earthquake three seconds beforehand can save 14 percent of casualties, 10 seconds can save 39 percent of casualties and 20 seconds can save 63 percent of casualties.
The early warning system has covered an area of 2.2 million square km, providing services to about 90 percent of the population in China's quake-prone regions, according to Wang.
【国内英语资讯:China Focus: Rescue operation continues as death toll rises to 13 in China earthquake】相关文章:
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