An earthquake is a phenomenon that happens without warning and that consists of shaking violently the ground and everything that surrounds it. It is the result of the release of the accumulated tension of the lithosphere movable plates or the crust. The earth's crust is divided into seven main plates, about 50 miles thick, which move slowly and continuously over the interior of the earth and several smaller plates. Earthquakes are of tectonic origin; That is, moving plates are responsible for the appearance of violent jolts. The occurrence of an earthquake in a populated area can cause numerous casualties and injuries, as well as extensive damage to property.
Earthquakes refer to the earthquake. There is continuous activity going under the surface of the earth. There are several large plates (size of continents) below the surface of the earth, which move (at a very slow speed). As part of this movement, they sometimes collide with each other. And, after the collision, they could still push on each other. As you continually keep pushing each other, there is increasing pressure - through these plates beneath the surface. And then, at one point, one of the dishes could slide over another. This causes an earthquake.
Some earthquakes can be caused by surface activity. For example, in a mountainous region, there could be a heavy landslide. Due to a large mass of land falling, at the point of fall, there could be a minor earth tremor, due to the impact of the fall. However, such earthquakes are generally not very important.