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Earthquakes
Plate Tectonics Part 5
| Term | Definition |
|---|---|
| Earthquake | A natural shaking of the lithosphere caused by a release of energy started in the rock |
| Epicenter | The location on Earth's surface directly above the focus |
| Focus | The point inside the earth where the quake originates |
| Seismometer | An instrument used to measure and record movement in the ground |
| Seismogram | Record of the seismometer |
| Mercalli Scale | Scale that measures the intensity of an earthquake based on the effects to earth's surface, humans, objects in nature, and other man-made structures (Highest intensities are closer and lower intensities are farther away) |
| Richter Scale | Logarithmic scale that measures the amount of energy released during an earthquake (Determined from the seismogram's amplitude of waves, distance from other seismograghs, and epicenter distance) |
| Magnitude | A number to quantify the amount of seismic energy released from an earthquake |
| Primary Waves (P-waves) | They are the fastest waves, travel through solids, liquids, and gases |
| Compressional | Particle travel in the direction of the wave movement |
| Secondary Wave (S-wave) | They are the slower waves, travel through solids only |
| Shear | Particles travel in right angles to the direction of wave movement |
| Shadow Zone | Area in which seismic waves are not detected due to the liquid outer core (P-waves are refracted in the outer core, S-waves are absorbed in the outer core) |
Created by:
cmbinder197
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