1. Faulting: The most fundamental change. Earthquakes are caused by the sudden release of energy along a fault, a fracture in the Earth's crust. This release causes the rock on either side of the fault to move relative to each other, resulting in:
* Displacement: One side of the fault shifts horizontally or vertically compared to the other. This can be a few millimeters to several meters.
* Folding: The intense pressure can cause the rocks to bend and fold, creating new landforms like hills or mountains.
2. Ground Shaking: The energy released from the fault travels outward as seismic waves. These waves cause the ground to vibrate and shake. The intensity of shaking depends on the magnitude of the earthquake, the distance from the epicenter, and the type of soil or rock present.
* Damage to structures: Ground shaking can cause severe damage to buildings, bridges, and other infrastructure.
3. Surface Rupture: In some cases, the movement along the fault can reach the Earth's surface, causing a visible break in the ground. This is known as a surface rupture.
* Change in topography: Surface ruptures can alter the landscape, creating cliffs, depressions, or changes in elevation.
