Is energy released in the crust during an earthquake?

Yes, energy is released in the Earth's crust during an earthquake. This energy originates from the buildup of stress along fault lines, where tectonic plates interact. When the stress exceeds the strength of the rocks, it results in a sudden release of energy, causing seismic waves that produce the shaking felt during an earthquake. This release of energy can also lead to deformation of the crust and damage to structures.