Maument magnitude scale

The moment magnitude scale (abbreviatit as MMS; denotit as MW or M) is uised bi seismologists tae measure the size o yirdquauks in terms o the energy released.[1] The magnitude is based on the seismic moment o the yirdquauk, which is equal tae the rigidity o the Yird multiplied bi the average amoont o slip on the faut an the size o the aurie that slipped.[2]


  1. Hanks, Thomas C.; Kanamori, Hiroo (May 1979). "Moment magnitude scale" (PDF). Journal of Geophysical Research. 84 (B5): 2348–50. Bibcode:1979JGR....84.2348H. doi:10.1029/JB084iB05p02348.
  2. "Glossary of Terms on Earthquake Maps". USGS. Retrieved 2009-03-21.