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The Walnut, California, earthquakes of July-August, 1959

SEISMOLOGICAL LABORATORY, CALIFORNIA INSTITUTE OF TECHNOLOGY,, PASADENA, CALIFORNIA

Abstract

A swarm of minor earthquakes began on July 29, 1959, near 34° 00' N, 117° 48' W. Records at Pasadena show P and S waves reflected from the Moho. A portable instrument recorded some of these at a point about 6 km. from the epicenter. The characteristic false S - P of about one second at short distances was recorded.

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