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Analyzing Earthquake
| 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 the major earthquake, but before the area has returned to its normal level of seismic activity. |
| epicenter | location on Earth's surface directly above an earthquake's focus or origin. |
| focus | Location beneath Earth's surface where the energy of an earthquake is released. |