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The moment magnitude scale (MMS; denoted explicitly with M or M w or Mwg, and generally implied with use of a single M for magnitude) is a measure of an earthquake's magnitude ("size" or strength) based on its seismic moment. M w was defined in a 1979 paper by Thomas C. Hanks and Hiroo Kanamori.
- Seismic magnitude scales - Wikipedia
The moment magnitude scale – Mw or M w – developed by...
- Richter scale - Wikipedia
For large earthquakes worldwide, the moment magnitude scale...
- Moment magnitude scale - Simple English Wikipedia, the free ...
The moment magnitude scale is a way to measure the power of...
- Seismic magnitude scales - Wikipedia
La escala sismológica de magnitud de momento ( Mw) es una escala logarítmica usada para medir y comparar terremotos. Está basada en la medición de la energía total que se libera en un sismo. Fue introducida en 1979 por Thomas C. Hanks y Hiroo Kanamori como la sucesora de la escala sismológica de Richter. 1 .
The moment magnitude scale – Mw or M w – developed by seismologists Thomas C. Hanks and Hiroo Kanamori, is based on an earthquake's seismic moment, M 0, a measure of how much work an earthquake does in sliding one patch of rock past another patch of rock.
Seismic moment is the basis of the moment magnitude scale introduced by Hiroo Kanamori, which is often used to compare the size of different earthquakes and is especially useful for comparing the sizes of large (great) earthquakes. The seismic moment is not restricted to earthquakes.
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 (M L), the body-wave scale (m b), and the surface-wave scale (M S).
- John P. Rafferty
For large earthquakes worldwide, the moment magnitude scale (MMS) is most common, although M s is also reported frequently. The seismic moment , M 0 , is proportional to the area of the rupture times the average slip that took place in the earthquake, thus it measures the physical size of the event.
The moment magnitude scale is a way to measure the power of earthquakes. It is the energy of the earthquake at the moment it happens. Like the similar and older Richter scale, it is logarithmic, with a base of ten. This means that an earthquake with a magnitude of 2 is ten times stronger than an earthquake with a magnitude of 1.
