Richter scale

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Related to Richter magnitude scale: Mercalli scale, Moment magnitude scale
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a logarithmic scale of 1 to 10 formerly used to express the magnitude of an earthquake on the basis of the size of seismograph oscillations

References in periodicals archive ?
Brown, Aberdeen ATHE Richter magnitude scale was developed in 1935 in California by Charles Richter and Beno Gutenberg to measure medium-sized earthquakes.
Grammatical and typographical errors and occasional glaring inaccuracies present some difficulties; for example reference is made to the "rector scale" for the Richter magnitude scale.
While seismologists generally do not use the original Richter magnitude scale, the measuring systems currently in vogue represent extensions of the type that Charles Richter developed nearly 60 years ago.
5 on the Richter magnitude scale, while the Japanese agency continues to list it at 7.