Richter Scale

A measure of the magnitude of an earthquake at its epicentre. Each point increase on the Richter scale is a 30 times increase in the magnitude.

MagnitudeRelative amount of energy released
11
231
3960
430000
5920000
629000000
7890000000
828000000000
9850000000000

Introduced in 1935 by the seismologists Beno Gutenberg and Charles Francis Richter.

See also: Earthquake, Mercalli Scale, Plate Techtonics, Seismic, Seismograph.

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Subjects: Geology Units