地震是可怕的,人类一直在努力研究它,试图掌握它的发生规律,以避免或减少它带来的各种危害。对地震了解得越多,我们就越能有效地保护自己。一、地震是怎么回事?地震又称地动、地振动,是地球内部发生急剧破裂产生的震波在一定范围内引起地面振动的现象。地球可分为三层。中心层是地核,地核主要是由铁元素组成;中间是地幔;外层是地壳。地震一般发生在地壳之中。 Earthquake is terrible, human beings have been trying to study it, trying to grasp its occurrence, in order to avoid or reduce the hazards it brings. The more we know about the earthquake, the more effectively we protect ourselves. First, the earthquake is how the matter? Earthquake also known as ground moving to the ground, is the Earth’s rapid rupture of the earthquake caused by a certain range of vibration caused by the phenomenon of the ground. Earth can be divided into three layers. The center layer is the core, the core is mainly composed of iron; the middle is the mantle; the outer layer is the crust. Earthquakes generally occur in the crust.