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Earthquake Vocab.
Definitions
| Question | Answer |
|---|---|
| Epicenter | point on Earth's surface directly above on earthquake's focus |
| Fault | the surface of such a break along which rock moves |
| Lava | molten rock flowing onto Earth's surface |
| Lithosphere | rigid layer of Earth about 100 km thick, made of the crust and a part of the upper mantle |
| Magnitude | a measure of the energy released by an earthquake |
| Rifts | long crack, fissure, or trough that forms between tectonic plates moving apart at plate boundaries. |
| Seismic safe | describes the ability of structures to stand up against the vibrations caused by an earthquake |
| Seismic waves | earthquake waves, including primary waves, secondary waves, and surface waves. |
| Surface waves | the slowest and largest of the seismic waves and they cause the most damage during a Earthquake. |
| Seismograph(also P and S waves) | an instrument they use to obtain a record of seismic waves from all over the world |
| Tsunami | powerful seismic sea waves that begins over at ocean-floor earthquake, can reach 30 min height when approaching lang, and can cause destruction in coastal areas |
| Volcanoes | cone-shaped hill or mountain formed when hot magma,solids, and gas erupt onto Earth's surface through a vent |
| Pyroclastic flow | hazard for inhabitants of Montserrat |
| Ritcher Scale | a scale to see the amount of seismic energy released by an earthquake |
| Hypocenter | the region of initiation of seismic energy within the Earth during earthquakes |
| Rayleigh waves | move along the surface of Earth form a wave thta is much like a ocean wave |
| Hypocenter | the region of initiation of seismic energy within the Earth during earthquakes |
| Rayleigh waves | move along the surface of Earth form a wave thta is much like a ocean wave |
| Love waves | displace Earth material at the surface in a horizontal snake-like motion.They don't travel through water |