一、地震及主要类型地震是由地球内部的变动引起的地壳震动,是地球上经常发生的一种自然现象。按形成原因,可分为以下几种类型:1.构造地震:由地壳岩层错动、破裂所形成,占地震的9096以上,破坏力也最大。本次512汶川地震,就是发生在龙门山中央断裂带巨大地应力释放形成的构造地震。 1. Earthquakes and Major Types Earthquakes are crustal vibrations caused by changes in the Earth’s interior and are a natural phenomenon that often occurs on Earth. According to the formation of reasons, can be divided into the following types: 1. Structural earthquake: the formation of the crust by the fault, rupture, accounting for more than 9096 earthquakes, the most destructive. This 512 Wenchuan earthquake is the tectonic earthquake that occurred in the tremendous stress release of the central Longmen Shan fault zone.