The Richter scale , also called the Richter magnitude scale, Richter's magnitude scale, and the Gutenberg–Richter scale, is a measure of the strength of earthquakes, developed by Charles Richter in collaboration with See more

The Richter scale was defined in 1935 for particular circumstances and instruments; the particular circumstances refer to it being defined for Southern California and "implicitly … See more

These formulae for Richter magnitude $${\displaystyle \ M_{\mathsf {L}}\ }$$ are alternatives to using Richter correlation tables based on Richter standard seismic event See more

1. ^ Kanamori 1978, p. 411. Hough (2007, pp. 122–126) discusses the name at some length.
2. ^ McPhee, John (1998). Annals of the Former World. Farrar, Straus and Giroux. p. 608.
3. ^ … See more

The Richter magnitude of an earthquake is determined from the logarithm of the amplitude of waves recorded by seismographs. … See more

Prior to the development of the magnitude scale, the only measure of an earthquake's strength or "size" was a subjective assessment of the intensity of shaking observed near the epicenter of the earthquake, categorized by various seismic intensity scales See more

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