PhaseNet与EQTransformer的震相拾取对比研究  

Comparative Study on Seismic Phase Picking of PhaseNet and EQTransformer

作　　者：周本伟 张丽芬[1,2] 戴苗 赵凌云[1,2] 魏贵春 周舟[1,2] ZHOU Benwei;ZHANG Lifen;DAI Miao;ZHAO Lingyun;WEI Guichun;ZHOU Zhou(Institute of Seismology,CEA,40 Hongshance Road,Wuhan 430071,China;Key Laboratory of Earthquake Geodesy,CEA,40 Hongshance Road,Wuhan 430071,China)

机构地区：[1]中国地震局地震研究所,武汉市430071 [2]中国地震局地震大地测量重点实验室,武汉市430071

出　　处：《大地测量与地球动力学》2023年第6期656-660,共5页Journal of Geodesy and Geodynamics

基　　金：中国地震局“三结合”课题(3JH-202201038);中国地震局地震研究所和应急管理部国家自然灾害防治研究院基本科研业务费(IS202236330);湖北省自然科学基金(2021CFA035)。

摘　　要：将湖北测震台网的地震波形作为数据集,采用PhaseNet和EQTransformer模型进行震相拾取,并对其表现及泛化能力进行测试评估。结果表明,对于P波而言,当震相概率阈值为0.1或0.3时,PhaseNet有较高的召回率,可检测到更多微震事件;EQTransformer的召回率略低,但精确率较高。S波的拾取效果差于P波,PhaseNet的精确率低于EQTransformer,但其召回率较高,F_(1)值也能保持在0.8左右,拾取表现较为稳定。进一步分析2种模型的拾取结果与事件震中距、信噪比及震级之间的关系发现,PhaseNet的震相拾取效果与震中距、信噪比的关联较强,与震级关系不大,信噪比越高的数据拾取效果越好;EQTransformer与信噪比的关联较强,信噪比越高拾取效果越好,与震中距和震级关系不大。We use the seismic waveform of Hubei seismic network as the data set and the most widely used PhaseNet and EQTransformer models to pick the seismic phase;its performance and generalization ability are tested and evaluated.The results show that for P waves,when the phase probability threshold is 0.1 or 0.3,PhaseNet has a better recall rate than EQTransformer and can detect more microseismic events.Although the recall rate of EQTransformer is slightly lower,the precision rate is higher.The pickup effect of S wave is poorer than that of the P wave.Although the precision rate of PhaseNet is lower than that of EQTransformer,its recall rate is significantly higher,and the F_(1)value can also be maintained at about 0.8,which has a relatively stable picking performance.We further analyze the relationship between the picking results of the two models and the epicentral distance,signal-to-noise ratio and magnitude of the event.The results show that the phase-picking effect of PhaseNet has a strong correlation with the epicentral distance and the signal-to-noise ratio,but little relationship with the magnitude.The influence of EQTransformer on the signal-to-noise ratio is relatively strong;the higher the signal-to-noise ratio,the better the pickup effect,and the lower the influence on the epicentral distance and magnitude.

关 键 词：PhaseNet EQTransformer 深度学习 震相拾取 泛化性 

分 类 号：P315[天文地球—地震学]