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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.
- Scala di magnitudo del momento sismico
La scala di magnitudo del momento sismico è una scala di...
- Seismic magnitude scales
The moment magnitude scale – Mw or M w – developed by...
- Richter scale
For large earthquakes worldwide, the moment magnitude scale...
- Scala di magnitudo del momento sismico
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 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.
La magnitudo (detta anche magnitudine o livello) si definisce come il rapporto tra la grandezza in esame e una grandezza campione a essa omogenea, misurato su scala logaritmica. Si noti come nel rapporto, essendo le grandezze in questione omogenee, la loro unità di misura si elida e perda quindi importanza ai fini della misurazione stessa [2].
