Content area
Characterized by frequent earthquakes and a dense population, Yunnan Province, China, faces significant seismic hazards and is a hot place for earthquake forecasting research. In a previous study, we evaluated the performance of the b value for 5-year seismic forecasting during 2000–2019 and made a forward prediction of M ≥ 5.0 earthquakes in 2020–2024. In this study, with the forecast period having passed, we first revisit the results and assess the forward prediction performance. Then, the background seismicity rate, which may also offer valuable long-term forecasting information, is incorporated into earthquake prediction for Yunnan Province. To assess the effectiveness of the prediction, the Molchan Error Diagram (MED), Probability Gain (PG), and Probability Difference (PD) are employed. Using a 25-year catalog, the spatial b value and background seismicity rate across five temporal windows are calculated, and 86 M ≥ 5.0 earthquakes as prediction samples are examined. The predictive performance of the background seismicity rate and b value is comprehensively tested and shown to be useful for 5-year forecasting in Yunnan. The performance of the b value exhibits a positive correlation with the predicted earthquake magnitude. The synergistic effect of combining these two predictors is also revealed. Finally, using the threshold corresponding to the maximum PD, we integrate the forecast information of background seismicity rates and the b value. A forward prediction is derived for the period from January 2025 to December 2029. This study can be helpful for disaster preparedness and risk management in Yunnan Province, China.
Details
; Wang, Rui 2
; Shi, Haixia 3 ; Miao, Miao 4
; Zhuang, Jiancang 5
; Chang, Ying 6 ; Jiang, Changsheng 7 ; Meng, Lingyuan 3 ; Li, Danning 8 ; Liu, Lifang 8 ; Su, Youjin 8 ; Zhang, Zhenguo 4
; Han, Peng 2
1 Department of Astronautical Science and Mechanics, Harbin Institute of Technology, Harbin 150001, China;
2 Department of Earth and Space Sciences, Southern University of Science and Technology, Shenzhen 518055, China;
3 China Earthquake Networks Center, Beijing 100045, China;
4 Department of Earth and Space Sciences, Southern University of Science and Technology, Shenzhen 518055, China;
5 Institute of Statistical Mathematics, Tokyo 190-8562, Japan;
6 BGRIMM Technology Group, Institute of Mining Engineering, Beijing 100160, China;
7 Institute of Geophysics, China Earthquake Administration, Beijing 100081, China;
8 Earthquake Administration of Yunnan Province, Kunming 650224, China;