Instrumental study of the Manix Earthquakes

Abstract

The circumstances of recording of the Manix series of earthquakes have been outlined in a preliminary report (Richter, 1947). We now present complete data for all the thirty-four better-recorded shocks of the series, determination of epicenters and depths, and results on crustal structure and wave velocities. A favorable circumstance is the surrounding of the epicentral region by stations with sensitive Benioff vertical-component seismometers. The data of Boulder City and Pierce Ferry are of critical importance, and we are especially indebted to the U. S. Coast and Geodetic Survey for these readings. It is particularly fortunate that Pasadena, Haiwee, Boulder City, and Palomar are at roughly equal distances in different azimuths.

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