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Earthquake Waves
Earth Science Terms
| definition | term |
|---|---|
| a vibration of the Earth produced by the rapid release of energy | Earthquake |
| The point within the earth where the Earthquake starts | Focus |
| Point on Earth's surface directly above where earthquakes starts. | Epicenter |
| rocks/plates snapback into an unbent position | Elastic Rebound |
| movement that follows a major earthquake (smaller earthquakes) | Aftershock |
| Small earthquakes before a major one | Foreshock |
| Measures the amount of shaking at a particular location | Intensity |
| measures the size of the earthquake at its source no distance factor | Magnitude |
| Intensity based on observed effects of quake on Earths surface, humans, and manmade structures | Mercalli Scale |
| Earthquake energy from seismic waves using a seismograph | Ricter Scale |
| Instrument for recording earthquakes | Seismograph |
| the data output(recording) of a seismograph | Seismogram |
| disturbance that transmits energy | Wave |
| wave particles vibrate perpendicular to wave direction | Transverse wave |
| wave particles vibrate parallel to wave direction | Longitudinal wave |
| Material a wave moves through | medium crest |
| Upward displacement of a wave | Trough |
| Height of a wave | Amplitude |
| distance between consecutive waves | Wavelength |
| Primary body wave(earthquake);fastest;least damaging;longitudinal wave | P waves |
| Secondary waves; Transverse; Shake and Shear; Medium speed; only goes through a solid | S waves |
| Slowest; goes through solids and liquids; most damaging | Surface waves |
| The time spent getting there | Travel-time |
| The technique for establishing two points | Triangultion |
| "Flaw" where earthquakes may occur | Fault |