In 1979, Caltech archivist Ann Scheid asked Charles Richter about women who had made research contributions during the early years at the Caltech Seismological Laboratory. Richter replied, “For many years two of the mainstays of the routine of the Laboratory were Gertrude Killeen, who did most of the photographic work, and Violet Taylor, who became my assistant in the measuring department.”1

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In the mid-20th century the Southern California Seismic Network comprised only a handful of independently operating stations, and the routine business of developing the records was a long way from the automated procedures and real-time communications that networks...

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