More than 2,000 Aftershocks in China

7 Beijing, Jun 4. -Around 2,499 aftershocks of reduced or moderate magnitude have shaken the Yushu Tibetan Autonomous Prefecture, in the province of Qinghai, which was devastated by a 7-degree quake in April. After the strong seism, such tremors are normal and they can keep on taking place for a prolonged period, informed Fan Lanbao, deputy director of the seismological

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