An earthquake is one of the most terrible disasters. These disasters often occur in some areas. For example when the earthquake happened in Indonesia beloved homeland of our 2004 years ago. Which also resulted in a tsunami that. This disaster has brought great losses to Indonesia. Do you know how earthquakes happen?earthquake is usually caused by the release of energy generated by the pressure by the moving plates that cause seismic waves. The longer the growing pressure and eventually reached the state where the pressure can not be arrested again by the edge of the plate. At that moment an earthquake is going to happen.
During the earthquake and afterward, stone slab began to move, and kept moving until caught again. Place underground where the rock is called the focus of earthquake rupture. And the place just above the focus is called the epicenter.