Examination of scaling between earthquake magnitude and proposed early signals in P waveforms from very near source stations in a South African gold mine

[1] We analyze near-source seismograms recorded in a deep South African mine for scaling between signals early in P waveforms and the magnitude M of the events. The data consist of recordings at 26 stations of 122 events with � 1.5 � 0, implying that the final earthquake size is affected statistically by the initial rupture process. If these correlations hold for larger earthquakes, as suggested by other studies, the early predominant period and peak displacement are useful for early warning systems.

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