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地震是地球上的一种自然现象。全世界每年发生约100万次地震,对人类造成严重地震灾害的平均每年达到10次以上。全世界的地震主要分布在环太平洋地震带和地中海地震带两条地震带内。地震按其成因可分为火山地震、陷落地震和构造地震。其中,构造地震占发生地震的95%以上,是造成地震灾害的主要地震,也是房屋建筑及其他工程抗震设计需要考虑的
Earthquakes are a natural phenomenon on earth. About 1 million earthquakes occur each year in the world and the average number of earthquakes that cause serious earthquakes to human beings is more than 10 times a year. Earthquakes around the world are mainly distributed in two seismic belts, the Pacific Rim and the Mediterranean Seismic Belt. According to their causes, earthquakes can be divided into volcanic earthquakes, earthquakes and tectonic earthquakes. Among them, tectonic earthquakes account for more than 95% of the earthquakes that occurred, which are the main earthquakes that cause earthquakes and also need to be taken into consideration in the seismic design of houses and other projects