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Seismic magnitude scales are used to describe the overall strength or "size" of an earthquake. These are distinguished from seismic intensity scales that categorize the intensity or severity of ground shaking (quaking) caused by an earthquake at a given location.
The Richter scale (/ ˈ r ɪ k t ər /), 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 Francis Richter in collaboration with Beno Gutenberg, and presented in Richter's landmark 1935 paper, where he called it the "magnitude ...
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These include body wave magnitude ( Mb) and surface wave magnitude ( Ms). Each is valid for a particular frequency range and type of seismic signal. In its range of validity, each is equivalent to the Richter magnitude.
Methodology. The moment magnitude scale was designed to produce a more accurate accounting of the total energy released by an earthquake, and it calculates the earthquake’s magnitude more accurately than other measures—such as the Richter scale ( ML ), the body-wave scale ( mb ), and the surface-wave scale ( MS ).
- John P. Rafferty
The local magnitude \(M_L\), or Richter’s magnitude, is often used for small events because it is easy to calculate (however, uncertainties are often large!). The moment magnitude \(M_w\) is the only magnitude that relates unambiguously to some physical earthquake parameter, the seismic moment \(M_0\).
Oct 29, 2019 · Published: 29 October 2019. An updated and unified earthquake catalog from 1787 to 2018 for seismic hazard assessment studies in Mexico. Rashad Sawires, Miguel A. Santoyo, José A. Peláez & Raúl...
