世界大海和大洋范围内地震和火山现象的分布及某些特征有—定的特殊性。众所周知,地震发生于地壳层或是地壳的下部,是由于其中产生的巨大应力,机械能瞬间释放的结果。这种应力从地震发生的中心——震源,以爆发的形式向远处辐散,成弹性波传播。震源在地表的投影,叫地震的震中。地震震中的分布不是没有秩序的,而是集中在一定的地带或环带,它们叫地震带。在这些地震带内地震不仅非常频繁,而且最有破坏力。地球上可分三个地震 The distribution and some characteristics of earthquakes and volcanoes in the world’s oceans and oceans have their own particularities. It is well known that earthquakes occur in the crust or in the lower part of the earth’s crust due to the tremendous stress generated therein and the immediate release of mechanical energy. This stress from the center of the earthquake occurred - the source of the outbreak in the form of divergence to the distant, into elastic waves. The projection of the source on the earth’s surface is called the epicenter of the earthquake. Earthquake epicenter distribution is not without order, but concentrated in a certain zone or zone, they are called seismic zone. The earthquakes in these zones are not only very frequent but also the most destructive. Earth can be divided into three earthquakes