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一、中国的地震活动中国是一个多地震的国家。本世纪以来的八十年内共发生破坏性地震二千六百余次,其中6级以上地震五百余次,平均每年5.4次。8级以上地震九次,平均九年发生一次。地震分布的范围很广,据记载,本世纪以来全国三十个省市均发生过5级以上的地震。值得注意的是全世界8级以上大震除了集中分布在环太平洋的岛弧、海沟与大陆边缘地区外,发生在大陆内部的,则主要集中分布在中国境内及其
First, China’s seismic activity China is a multi-earthquake country. In the 80 years since the beginning of this century, a total of 2,600 destructive earthquakes occurred, of which more than 500 were earthquakes of magnitude 6 or above, averaging 5.4 times per year. Earthquakes of magnitude 8 or above occurred nine times, on average, in nine years. The scope of the earthquake distribution is very wide. According to records, more than 5 earthquakes occurred in 30 provinces and cities nationwide since the 20th century. It is worth noting that in addition to the arcs, trenches and the edge of the continental margin concentrated in the Pacific Rim, earthquakes above M8 above the world occur mainly in the interior of China,