《地震》ppt课件

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1、地震全球每年发生地震约500万次，其中能感觉到的有５万多次，能造成破坏性的５级以上的地震约1000次，而７级以上有可能造成巨大灾害的地震约几十次。我国是一个多地震的国家一、地震灾害的严重性唐山大地震发生日期：1976年7月28日发生时间：凌晨3:42地震级数：7.8級死伤数字：24万多人死亡，16万多人，重伤，80多万人受伤。唐山市位于河北省东部5.122008年四川省汶川县发生里氏8.0级大地震pingdingshan.99114.com/pifa-128/pingdingshan.99114.com/pifa-118/pingdingshan.99114.co

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