Since the introduction of the concept of magnitude to seismology by Richter (1935), many different magnitude scales have been proposed. The United States Geological Survey National Earthquake Information Center (NEIC) routinely uses many of these, including moment magnitude, Mw (Hanks and Kanamori, 1979); energy magnitude, Me (Choy and Boatwright, 1995); surface‐wave magnitude, Ms (International Association of Seismology and Physics of the Earth’s Interior, IASPEI); short‐period teleseismic P‐wave magnitude, mb (Gutenberg and Richter, 1956); local magnitude, ML (Richter, 1935; Hutton and Boore, 1987); surface‐wave magnitude...

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