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国家地理2010十大发现:诺亚方舟遗迹上榜(图)(10)

2010-12-02 09:52:04 【

    10.智利地震改变地轴令时长缩短

国家地理2010十大发现:诺亚方舟遗迹上榜(图)

智利地震改变地轴令时长缩短(图片提供: NASA Earth Observatory)

    美国宇航局称,今年2月发生在智利的里氏8.8级大地震冲击力巨大,可能移动了地球轴心,缩短了一天的时长。美宇航局下属喷气推进实验室地球物理学家理查德·格罗斯通过电脑模型模拟了智利大地震造成的影响。模拟结果显示,由于加快地球自转速度,智利大地震可能使地球一天的时长缩短了1.26微秒(1微秒等于百万分之一秒)。

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