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地震又称地动、地震动,是一种强烈的地壳运动,地震发生时,会诱发滑坡、泥石流、海啸等其他灾害,是破坏性自然灾害之一。历史上,我国地震频繁,据《中国地震目录》统计,从公元前1831年到1969年近四千年间,我国境内多有地震发生,其中震级在4.7以上(含4.7)的有3187次~①。特别是近代以来“除个别年份外,在中国大地上,几乎每年都有地震发生,地震的强度更是骇人听闻。~②”我国西南位于印度洋板块与亚欧板块交界地带,属欧亚地震带的喜马拉雅山地震带,为我国地震的多发
Earthquake, also known as ground motion, is a kind of strong crustal movement. When an earthquake occurs, it can cause landslide, debris flow, tsunami and other disasters. It is one of the devastating natural disasters. According to the statistics of China Earthquake Directory, from the 1831 BC to the nearly 4,000 years in 1969, there were many earthquakes in our country, of which 3187 times were magnitude 4.7 or above (including 4.7) ①. Especially since the modern era, “except for some years, earthquakes have occurred on the earth in China almost every year and the intensity of the earthquake is even more appalling.” 2) "The southwestern part of China is located at the junction of the Indian Ocean plate and the Asia-Europe plate plateau and belongs to the Eurasian earthquake Belt of the Himalayas seismic belt, for our country’s multiple earthquakes