Liu Liqiang, Ma Jin. NONLINEAR DEVIATION OF THE FREQUENCY-MAGNITUDE DISTRIBUTION AND ITS SIGNIFICANCE-TAKING NORTH-WEST BEIJING AND DATONG AREA AS EXAMPLES[J]. North China Earthquake Sciences, 1992, 10(3): 27-32.
Citation: Liu Liqiang, Ma Jin. NONLINEAR DEVIATION OF THE FREQUENCY-MAGNITUDE DISTRIBUTION AND ITS SIGNIFICANCE-TAKING NORTH-WEST BEIJING AND DATONG AREA AS EXAMPLES[J]. North China Earthquake Sciences, 1992, 10(3): 27-32.
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NONLINEAR DEVIATION OF THE FREQUENCY-MAGNITUDE DISTRIBUTION AND ITS SIGNIFICANCE-TAKING NORTH-WEST BEIJING AND DATONG AREA AS EXAMPLES

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  • It is known that the Frequency Magnitude relationship in Gutenberg-Richter law, lg(N)=A-B·M, is nonlinear based on the statistics by using seimological catalogue.A turning isusually occurred in magnitude of 3 to 4.Call the slope of the higher segment in Frequency Magnitude relationship as Bh, the lower as Bl and the angle between them as a-the Non-linear Deviation.And suppose a is negative when Bh>Bl, elso is positive.A positive devia-tion before strong earthquakes was found by the time-space scanning of a in North West Bei-jing and Datong area.
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