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aev
| Term | Definition |
|---|---|
| BODY WAVE | an earthquake wave that travels through the body of earth rather than on its surface. |
| SURFACE WAVE | an earthquake wave that travels at or near the surface of earth. |
| P-WAVE | a primary earthquake wave that travels through the body of earth;so named because it is the first wave to reach a seismograph station during an earthquake. |
| S-WAVE | a secondary earthquake wave, so named because it travels slower than a primary wave and is the second wave to reach the seismograph station after an earthquake. it travels through the body of earth as a series of crests and troughs. |
| AFTERSHOCK | an earthquake that occurs later along the same fault zone as a major earthquake , but before the area has returned to its normal level of seismic activity. |
| EPICENTER | location on earths surface directly above an earthquakes focus, or origin. |
| FOCUS | location beneath Earth's surface where the energy of an earthquake is released. |