Research on determining the annual earthquake occurrence rates of potential seismic source areas |
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| Authors: | Jiancheng Lei Zhenliang Shi and Jiaquan Yian |
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| Institution: | (1) Seismological Bureau of Sichuan Province, 610041 Chengdu, China;(2) Institute of Geophysics, State Seismological Bureau, 100081 Beijing, China |
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| Abstract: | To actually reflect the seismic temporal-spatial inhomogeneity of intra continental strong earthquakes of North China in seismic
hazard analysis, several seismological and geological characteristics have been selected and quantized to describe the seismicity
features in time and space of every magnitude interval with the thought of dividing the interesting magnitude range into several
intervals and using of spatial probability distribution function. A component analysis method with orthogonal transformation
is introduced to avoid the repeated use of the same element and the subjective effects in determining the annual earthquake
occurrence rates of earthquake. By passing synthetic fuzzy judgement on the nonintercorrelated new characteristics, the annual
occurrence rates of every magnitude interval of each potential source area are obtained associated with the adjustments of
earthquake reducing process after the occurrence ofM>7 quake. An intensity map of the Beijing-Tianjin-Zhangjiakou area is calculated as an example which shows a close coincidence
with the seismic temporal-spatial inhomogeneity of North China.
The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,13, 496–504, 1991. |
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| Keywords: | potential seismic source area annual earthquake occurrence rate magnitude interval seismic temporal-spatial inhomogenity component analysis method synthetic fuzzy judgement |
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