Two explosions detonated to crush rocks in northeast China caused a small earthquake near the North Korean border on Monday, local authorities said. The explosions were set off by Jilin Longye Blasting Company due to the "manufacturing needs" of the rock-crushing facility, said the Hunchun city government through its official Twitter-like Weibo. Earthquakes at the border can raise alarm due to nuclear tests in North Korea that have caused tremors in China in the past.

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