基于“山西2015速度模型”的定位方法对比研究
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摘要
为了确定山西台网基于"山西2015速度模型"的相对固定的定位方法,选择2010~2016年最大空隙角小于45°、参与定位台站数大于40的103个地震事件,分别采用单纯形法、Hypo2000、Hyposat结合PTD等3种方法重新测定。结果显示,单纯形法和Hyposat结合PTD测定的残差以及网缘地震的震中距两方面均优于Hypo2000;在震源深度方面,Hyposat结合PTD的结果较为可信。综合分析认为,基于"山西2015速度模型"定位地震时,山西台网应固定使用Hyposat结合PTD的方法。
In order to determine the relative fixed positioning method of Shanxi station's speed model based on the"Shanxi 2015 velocity model",103 earthquake events with the maximum clearance angle of less than 45° from 2010 to 2016 and more than 40 positioning stations are selected as targets.The results show that the residuals of the simplex method and Hyposat combined with PTD determination and the epicenter distance of the net margin earthquake are superior to that of Hypo2000 and of Hyposat binding PTD in terms of focal depth.According to the comprehensive analysis,when the Shanxi 2015 velocity model is used to locate the earthquake,the Shanxi network should be fixed with Hyposat and PTD method.
In order to determine the relative fixed positioning method of Shanxi station's speed model based on the"Shanxi 2015 velocity model",103 earthquake events with the maximum clearance angle of less than 45° from 2010 to 2016 and more than 40 positioning stations are selected as targets.The results show that the residuals of the simplex method and Hyposat combined with PTD determination and the epicenter distance of the net margin earthquake are superior to that of Hypo2000 and of Hyposat binding PTD in terms of focal depth.According to the comprehensive analysis,when the Shanxi 2015 velocity model is used to locate the earthquake,the Shanxi network should be fixed with Hyposat and PTD method.
引文
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[9]殷伟伟,李颖,赵永,等.山西地区Pb震相识别及特征研究[J].地球物理学进展,2017,32(1):95-100(Yin Weiwei,Li Ying,Zhao Yong,et al.Study on Identification and Characteristics of the Pb Phase in Shanxi Area[J].Progress in Geophysics,2017,32(1):95-100)
[10]朱元清,夏从俊,李平.确定震源深度的PTD方法及其应用[J].地震地磁观测与研究,1997,18(3):21-26(Zhu Yuanqing,Xia Congjun,Li Ping.PTD Method:a New Method for Determinating Focal Depth and Its Application[J].Seismological and Geomagnetic Observation and Research,1997,18(3):21-26)
[2]Geiger L.Probability Method for the Determination of Earthquake Epicenters from Arrival Timeonly[J].Bull St Louis Univ,1912,8(1):56-71
[3]田玥,陈晓菲.地震定位研究综述[J].地球物理学进展,2002,17(1):147-155(Tian Yao,Chen Xiaofei.Review of Seismic Location Study[J].Progress in Geophysics,2002,17(1):147-155)
[4]金春华,何秋菊,蔡新华,等.宁夏地区地壳新速度模型在地震定位中的应用[J].地震,2015,35(2):51-60(Jin Chunhua,He Qiuju,Cai Xinhua,et al.Application of a New Crust Velocity Model in Earthquake Location in Ningxia[J].Earthquake,2015,35(2):51-60)
[5]张炳,汪贵章,戚浩,等.Hypo2000与单纯形定位方法对比及作为速报算法的可行性分析[J].地震地磁观测与研究,2012,33(5):13-17(Zhang Bing,Wang Guizhang,Qi Hao,et al.Analysis of Feasibility of Hypo2000as an Earthquake Quick Report Location Program and Its Comparison with Simplex Location Program[J].Seismological and Geomagnetic Observation and Research,2012,33(5):13-17)
[6]梁向军,董春丽,张蕙.基于“十五”测震分析处理软件MSDP的多种地震定位方法[J].地震地磁观测与研究,2012,33(3):318-323(Liang Xiangjun,Dong Chunli,Zhang Hui.Comparative Study on Various Location Methods Based on“the Tenth-Five Year Plan”Seismological Analysis Program MSDP[J].Seismological and Geomagnetic Observation and Research,2012,33(3):318-323)
[7]马建新,陈继峰,万玉杰.Locsat与Hyposat方法在青海地区地震定位结果的对比分析[J].高原地震,2015,27(1):42-46(Ma Jianxin,Chen Jifeng,Wan Yujie.Comparative Analysis on Earthquake Locating Results by Locsat and Hyposat Methods in Qinghai Province[J].Plateau Earthquake Research,2015,27(1):42-46)
[8]殷伟伟,陈存田,宋秀青,等.山西地区2015地壳速度模型研究[J].中国地震,2016,32(3):491-501(Yin Weiwei,Chen Cuntian,Song Xiuqing,et al.The 2015Crustal Velocity Model for the Shanxi Region[J].Earthquake Research in China,2016,32(3):491-501)
[9]殷伟伟,李颖,赵永,等.山西地区Pb震相识别及特征研究[J].地球物理学进展,2017,32(1):95-100(Yin Weiwei,Li Ying,Zhao Yong,et al.Study on Identification and Characteristics of the Pb Phase in Shanxi Area[J].Progress in Geophysics,2017,32(1):95-100)
[10]朱元清,夏从俊,李平.确定震源深度的PTD方法及其应用[J].地震地磁观测与研究,1997,18(3):21-26(Zhu Yuanqing,Xia Congjun,Li Ping.PTD Method:a New Method for Determinating Focal Depth and Its Application[J].Seismological and Geomagnetic Observation and Research,1997,18(3):21-26)