Plate tectonics, earthquakes.

A plate tectonic or lithospheric plate is a piece of lithosphere that moves as a rigid block without internal deformation present on the Earth's asthenosphere.

Plate tectonics is the theory that explains the structure and dynamics of Earth's surface. It states that the lithosphere (the upper cooler and rigid Earth) is fragmented into a series of plates that move over the mantle. This theory also describes the plate motion, their addresses and interactions. The earth's lithosphere is divided into large plates and plates less than or microplates. At the edges of the plates is concentrated seismic activity, volcanic and tectonic. This leads to the formation of large chains and basins.

Earth is the only planet in the Solar System with active tectonic plates, although there is evidence that Mars, Venus and some of lossatélites Galilean, like Europe, was tectonically active in ancient times.

Seismic

An earthquake is a vibration caused by the mass loss of stability of bark. When the motion reaches the surface and spreads it will call earthquake.