Reliability of Seismograph Stations

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IN a recent paper, Dr. H. Jeffreys1 works out a reliability factor for seismograph stations throughout the world, using information from the International Seismological Summary for 1930 January to 1931 March. Reliability results based on this information do not, however, represent present conditions. Seismology has made rapid headway since 1931, and a number of stations have improved both their recording equipment and their timing.

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  1. 1

    ” A Comparison of Seismological Stations”, Mon. Not. Roy. Ast. Soc., Geophys. Suppl., 3, No. 9, 423 (April, 1936).

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