Where are earthquake movement first of?

Earthquake movement first occurs at the focus, or hypocenter, which is the point within the Earth where the stress along a fault line exceeds the strength of the rocks, causing a sudden release of energy. This energy propagates outward in the form of seismic waves, which we perceive as shaking on the surface. The location directly above the focus on the Earth's surface is known as the epicenter, where the effects of the earthquake are typically felt most strongly.