A moment magnitude scale
Thomas C. HanksU.S. Geological Survey, Menlo Park, California 94025Hiroo KanamoriSeismological Laboratory, California Institute of Technology, Pasadena, California 91125
1979en
ABI
Abstract
The nearly coincident forms of the relations between seismic moment M 0 and the magnitudes M L , M S , and M w imply a moment magnitude scale M = ⅔ log M 0 ‐ 10.7 which is uniformly valid for 3 ≲ M L ≲ 7, 5 ≲ M s ≲ 7½, and M w ≳ 7½.
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