Earthquake All natural earthquakes occur in the lithosphere. Seismic wave studies offer a full picture of the layered interior. An earthquake is, simply put, shaking of the earth’s crust . It is caused due to the energy release, which triggers waves that travel in all directions. The emanation of energy occurs along a fault. A fault is a sharp break in the crustal rocks. Rocks along a fault generally move in opposing directions. Classification of Earthquakes Tectonic earthquakes: The most common form of earthquakes, is caused by the movement of loose fragmented pieces of land on earth’s crust knowns as tectonic plates. Volcanic earthquake: The less prevalent compared to the tectonic variety, these earthquakes happen before or after the eruption of a volcano . It is caused when magma leaving the volcano is filled by rocks being pushed to the surface. Collapse earthquake: This earthquake occurs in un
