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A magnitude-energy relation for large earthquakes

INSTITUTE OF GEOPHYSICS AND PLANETARY PHYSICS UNIVERSITY OF CALIFORNIA, LOS ANGELES, CALIFORNIA

Abstract

A relation between the magnitude of a shallow earthquake and the rupture parameters is derived by using a result of dislocation theory and assumptions as suggested from model studies: the average of the pre- and post-shock stresses on a fault and the seismic efficiency are approximately constant. Comparing this relation with observations of the rupture parameters for a number of large shallow earthquakes, the magnitude-energy relation

is obtained. The value of is estimated to be approximately 10.

Footnotes

¹ Now at National Center for Earthquake Research, U. S. Geological Survey, 345 Middlefield Road, Menlo Park, California

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