Previous results are revised and extended. Most of the former conclusions are notably strengthened. 2000 shallow shocks and about 1000 deep-focus shocks are located. Magnitudes of shocks are assigned for the first time. Ninety-two great earthquakes (magnitudes 7 3/4 or over) been identified for 1904-1945, and 334 major shocks (7.0 to 7.7) for 1918-1945. Geographical are presented in a new set of maps.
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Gutenberg et al. (2012) studied this question.
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