Fast and Curious: Natural Hazards (7th)

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Liquefaction

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The conversion of soil into a fluidlike mass during an earthquake or other seismic event.

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Modified Mercalli intensity scale

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A rating scale that measures earthquake intensity based on descriptions of the earthquake's effects on people and structures.

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Landslide

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A rapid, downhill movement of soil, loose rocks, and boulders.

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Moment magnitude scale

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A rating scale that measures the energy released by an earthquake, considering the size of the fault, the motion along the fault, and the strength of the rocks that break.

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Hurricane

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An intense tropical storm with winds exceeding 119 km/h.

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Tsunami

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A series of ocean waves caused by any large and sudden disturbance of the sea, often due to underwater earthquakes.

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Earthquake

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A sudden shaking of the ground caused by the movement of tectonic plates.

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Seismic waves

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Waves of energy that travel through the Earth, often caused by earthquakes.

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Epicenter

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The point on the Earth's surface directly above the focus of an earthquake.

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Focus (or Hypocenter)

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The point within the Earth where an earthquake originates.