Nonlinear magnitude frequency relation and two types of seismicity systems |
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| Authors: | Shi-Jun Chen Zhi-Cai Wang and Jiu-Qing Tao |
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| Institution: | (1) Seismological Bureau of Shandong Province, 250014 Ji’nan, China |
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| Abstract: | A nonlinear magnitude frequency equation has been derived in this paper on the assumption that all seismicity systems hold
fractal characteristics, and according to the differences of relevant coefficients in the equation, seismicity systems are
classified into two types: type I, the whole earthquake activity is controlled by only one great unified system; type II,
the whole earthquake activity is controlled by more than one great system. One type of seismicity system may convert to the
other type, generally. For example, a type I system will change to a type II system prior to the occurrence of a strong earthquake
in North China. This change can be regarded as an index for earthquake trend estimation. In addition, the difference between
b value in nonlinear magnitude frequency equation and that in linear equation and the term dΔM related to the coefficients of nonlinear terms obtained in this paper are proved to be a pair of available parameters for
medium short term earthquake prediction. |
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| Keywords: | nonlinear magnitude frequency relation two types of seismicity systems fractal seismic fault earthquake prediction |
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