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。地震知识ABC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 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. Earthquake Knowledge ABC First, the earthquake is how the case? Earthquake also known as ground motion, vibration, is the earth’s rapid internal rupture caused by the shock caused by a certain range of ground vibration phenomenon. Earth can be divided into three layers. The core layer is the core, the core is mainly by