Abstract
In this paper, we have proposed an alternative seismic hazard modeling by using distributed seismicites. The distributed seismicity model does not need delineation of seismic source zones, and simplify the methodology of probabilistic seismic hazard analysis. Based on the devastating earthquake catalogue, we established three seismicity model, derived the distribution of a-value in northern China by using Gaussian smoothing function, and calculated peak ground acceleration distributions for this area with 2%, 5% and 10% probability of exceedance in a 50-year period by using three attenuation models, respectively. In general, the peak ground motion distribution patterns are consistent with current seismic hazard map of China, but in some specific seismic zones which include Shanxi Province and Shijiazhuang areas, our results indicated a little bit higher peak ground motions and zonation characters which are in agreement with seismicity distribution patterns in these areas. The hazard curves have been developed for Beijing, Tianjin, Taiyuan, Tangshan, and Ji’nan, the metropolitan cities in the northern China. The results showed that Tangshan, Taiyuan, Beijing has a higher seismic hazard than that of other cities mentioned above.
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Foundation item: One Hundred Individual Program of Chinese Academy of Sciences, National Natural Science Foundation of China (40574022) and Foundation for Seismological Researches of the Institute of Crustal Dynamics, China Earthquake Administration, (ZDJ2007-1).
Contribution No. 08FE3002, Institute of Geophysics, China Earthquake Administration.
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Yang, Y., Shi, Bp. & Sun, L. Seismic hazard estimation based on the distributed seismicity in northern China. Earthq Sci 21, 202–212 (2008). https://doi.org/10.1007/s11589-008-0010-1
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DOI: https://doi.org/10.1007/s11589-008-0010-1
Key words
- distributed seismicity
- Gaussian smoothed function
- seismic hazard estimation
- northern China
- peak ground acceleration