Search Result for "moment magnitude scale":
Wordnet 3.0

NOUN (1)

1. a logarithmic scale of 1 to 10 (a successor to the Richter scale) that enables seismologists to compare the energy released by different earthquakes on the basis of the area of the geological fault that ruptured in the quake; 



WordNet (r) 3.0 (2006):

moment magnitude scale
    n 1: a logarithmic scale of 1 to 10 (a successor to the Richter
         scale) that enables seismologists to compare the energy
         released by different earthquakes on the basis of the area
         of the geological fault that ruptured in the quake