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体应变地震波最大振幅与地震震级和震中距的统计关系探讨
姜佳宁,吴利军
作者单位E-mail
姜佳宁 河北省地震局张家口中心地震台, 张家口 075000  
吴利军 中国地震局地震预测研究所, 北京 100036 wulj@cea-ies.ac.cn 
摘要:
本文利用天堂河台2008年-2014年体应变观测结果,对中国大陆及临区MS≥6.0级和全球MS≥7.0级地震的同震地震波最大振幅与震级和震中距的关系进行了统计分析。根据统计结果,得出了震级的统计公式为MS=0.37lnAmax+0.57lnD+0.07。由震级统计公式推导出最大振幅的理论值公式为,这种关系表明,体应变地震波最大振幅随震级的增大呈指数函数增大,随震中距的增大呈幂函数减小,且与两者的乘积复相关。根据研究结果,探讨了高采样率前兆仪器应用于地震监测的必要性,并对未来精确的地震预报进行了展望。
关键词:  体应变  地震波  统计分析  高采样率  地震监测  地震预报
DOI:
分类号:
基金项目:This project was sponsored by the Specific Fund of Fundamental Research, Institute of Geophysics, China Earthquake Administration (DQJB16B19).
The Statistical Relationship between the Maximum Amplitude of the Body Strain Record and the Surface-wave Magnitude and Epicenter Distance
Jiang Jianing,Wu Lijun
Abstract:
Based on the body strain record of Tiantanghe station from 2008 to 2014, we make a statistical analysis of the relationship between the maximum amplitude of the body strain record and the surface-wave magnitude, epicenter distance of the earthquakes, which occurred in the Chinese mainland and its surrounding areas with MS ≥ 6.0 and the rest of the world with MS ≥ 7.0. According to statistical results, we propose a statistical formula between the surface-wave magnitude of earthquake and the maximum amplitude of the body strain record, the epicenter distance:MS*=0.37lnAmax+0.57lnD+0.07. We can also derive a theoretical estimation formula for the maximum amplitude:Amax=e2.7(MS*-0.07)D-1.54. This demonstrates that the maximum amplitude of the body strain record increases exponentially with the increase of the surface-wave magnitude, and decreases with the increase of the epicenter distance, and shows a negative correlation with their product. We further discuss the necessity of adding instruments with high frequency sampling to earthquake monitoring, and dicuss the prospects for precise earthquake prediction in future.
Key words:  Body strain  Seismic wave  Statistical analysis  High sampling rate  Earthquake monitoring  Earthquake prediction