The Earth’s crust consists of seven giant lithospheric plates and diverse smaller plates. These plates move towards one another (a focussed boundary), apart (a divergent boundary) or past one another (a remodel boundary)
Earthquakes square measure caused by a sharp unharness of stress on faults within the layer. the continual motion of tectonic plates causes a gentle build-up of pressure within the rock strata on either side of a fault till the strain is sufficiently nice that it’s discharged in a very sharp, jerky movement. The ensuing waves of unstable energy propagate through the bottom and over its surface, inflicting the shaking we have a tendency to understand as earthquakes.