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地震是人们十分熟悉的自然现象,按浅、中、深源地震的标准,可分为浅源地震、中源地震和深源地震;按其成因,可分为构造地震、火山地震、塌陷地震、水库地震和其他地震。浅源地震:指震源深度在0—70千米之内的地震,占地震总数的72.5%,尤以震源深度在30千米以内者居多。浅源地震在世界上分布广泛,我国发生的地震多为浅源地震。如云南通海地震和唐山——丰南地震
Earthquakes are well-known natural phenomena. According to the criteria of shallow, middle and deep earthquakes, they can be divided into shallow-source earthquakes, middle-source earthquakes and deep-source earthquakes. According to their causes, they can be divided into tectonic earthquakes, volcanic earthquakes, collapsed earthquakes , Reservoir earthquakes and other earthquakes. Earthquake of shallow source: refers to earthquakes with source depth of 0-70 km, accounting for 72.5% of the total number of earthquakes, especially those with source depth less than 30 km. Shallow source earthquakes are widely distributed in the world. Most earthquakes in our country are shallow earthquakes. Such as the Tonghai-Yunnan earthquake and the Tangshan-Fengnan earthquake