| A | B |
|---|
| aftershock | Smaller earthquakes that follow the main earthquake. |
| asthenosphere | A subdivision of the mantle situated below the lithosphere. The rock within this |
| body wave | Seismic waves that travel through Earth's interior. |
| crust | The very thin outermost layer of Earth. |
| earthquake | The vibration of Earth produced by the rapid release of energy. |
| elastic rebound | The sudden release of stored strain in rocks that results in movement along a |
| epicenter | The location on Earth's surface that lies directly above the focus of an earthquake. |
| fault | A break in a rock mass along which movement has occurred. |
| fault creep | Displacement along a fault that is so slow and gradual that little seismic activity |
| focus | The zone within Earth where rock displacement produces an earthquake. |
