[1]ZENG Xianwei,LI Wenjun,MA Chongzhi,et al.Strong Earthquake Risk in Wuzhong-Lingwu Region of Ningxia Based on b-value[J].Journal of Seismological Research,2021,44(01):41-48.
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Strong Earthquake Risk in Wuzhong-Lingwu Region of Ningxia Based on b-value
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
44
Number of periods:
2021 01
Page number:
41-48
Column:
Public date:
2021-01-15
- Title:
- Strong Earthquake Risk in Wuzhong-Lingwu Region of Ningxia Based on b-value
- Keywords:
- Wuzhong-Lingwu region; b-value; the maximum likelihood method; seismic risk; sparse segment of small earthquakes
- CLC:
- P315.75
- DOI:
- -
- Abstract:
- In the paper,we relocated the earthquakes in Wuzhong-Lingwu region from Jan.,1970 to Oct.,2018 based on Hypo2000 and HypoDD methods.Then,analyzing the horizontal distribution of b-value,focal depth profile and b-value profile along active fault,we studied the potential risk of strong earthquakes in the study region.The results show that:① There is a risk of MS5.1～5.4 earthquakes near Xinhuqiao area.However,the b-value time series curve does not support the occurrence of medium-strong earthquakes in the region in a short time.② The Wuzhong MS6.0 earthquake on Feb.22,1921 is likely to occur in Wuzhong-Gaozha region.The focal depth of the earthquake is about 15 km,and the shallow part of the upper crust is probably unbroken.③ There is still a risk of strong earthquakes with MS6.2～6.3 in the shallow crust of the Wuzhong-Gaozha region and the focal depth is within 10 km.
- References:
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- Similar References:
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Last Update:
2021-01-15