HOMOGENEOUS CATALOGS OF EARTHQUAKES*
Abstract
The usual bias in earthquake catalogs against shocks of small magnitudes can be removed by testing the randomness of the magnitudes of successive shocks. The southern California catalog, 1933-1967, is found to be unbiased in the sense of the test at magnitude 4 or above; the cutoff is improved to M = 3 for the subcatalog 1953-1967.
Footnotes
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↵ * Publication no. 741, Institute of Geophysics, University of California (Los Angeles). This research was supported by U.S. Atomic Energy Commission contract AT(11-1)34-146.
