[1]WEN Wen,SUI Mingkun,ZHUANG Ruxin,et al.Seismic Hazard Assessment of Yunnan Based on Historical Seismic Intensity[J].Journal of Seismological Research,2023,46(03):422-429.[doi:10.20015/j.cnki.ISSN1000-0666.2023.0047]
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Seismic Hazard Assessment of Yunnan Based on Historical Seismic Intensity
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
46
Number of periods:
2023 03
Page number:
422-429
Column:
Public date:
2023-09-01
- Title:
- Seismic Hazard Assessment of Yunnan Based on Historical Seismic Intensity
- Keywords:
- seismic intensity; probabilistic seismic hazard assessment; seismic hazard risk; return period; exceedance probability; Yunnan
- CLC:
- P315.91
- DOI:
- 10.20015/j.cnki.ISSN1000-0666.2023.0047
- Abstract:
- Firstly,we collected the earthquake-intensity data of the M6.0 earthquakes in 1713-2022,and the M5.0(intensity≥Ⅵ)earthquakes in 1900-2022. Secondly,we divided Yunnan area into 0.1°×0.1°grids to analyze the impact of these historical earthquakes on the grids. We established the relation between the intensity and its occurrence frequency(or return period). Then we assessed the probabilistic seismic hazard in Yunnan,and obtained the return period of a certain intensity in each grid,and assessed the exceedance probability of a certain intensity in 50 years. Thirdly,based on the relations between the intensity and the acceleration,we obtained the exceedance probability of the peak ground acceleration(PGA)in 50 years in Yunnan. On this basis we analyzed the relations between the return period and the seismogeological structures in Yunnan. And we compared our PGA results with the ones provided by the Seismic Ground Motion Parameters Zonation Map of China. We found that in the zones with the short return period(or high repetition frequency),the active faults were densely distributed. The distribution of the exceedance probability of the PGA in 50 years which obtained in this paper is generally in line with the distribution of the exceedance probability of the PGA in 50 years given by the Seismic Ground Motion Parameters Zonation Map of China. Specifically,in some cities or counties,the PGAs obtained in this paper are larger than the ones given by the Seismic Ground Motion Parameters Zonation Map of China; in other cities or counties,the PGAs obtained in this paper are smaller than the ones given by the Seismic Ground Motion Parameters Zonation Map of China.
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Last Update:
2023-06-25