地震相关的常识

What are the different types of earthquakes?
There are three major types of earthquake. Firstly, geologic earthquakes - sometimes called tectonic earthquakes - are caused by the rupturing of faults in the earth's crust. There are volcanic earthquakes, caused by the movement of magma in volcanoes. Lastly, there are various types of earthquakes caused by man-made activities, for example, explosions or the collapse of large structures.

地震分几种？
地震主要分三种。首先，地质地震-有时也叫做构造地震-是由地球的地壳层破裂造成的。还有火山地震，有火山岩浆运动引起。最后，有很多种地震是由人类活动造成的。比如，爆炸和大型建筑物倒塌。