Richter scale

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A numerical scale for expressing the magnitude of an earthquake on the basis of seismograph oscillations. The more destructive earthquakes typically have magnitudes between about 5.5 and 8.9; it is a logarithmic scale and a difference of one represents an approximate thirtyfold difference in magnitude. It is named after Charles F. Richter (1900–85), American geologist.

Subjects: Earth Sciences and Geography.

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