基于高频GPS峰值地动位移的震级标度探讨
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摘要
综合地震学地震震级公式和目前连续GPS研究震级标度的成果,使用国内外M_W5.9～9.1的17个地震事件的高频GPS测站的峰值地动位移数据,构建了新的基于GPS峰值地动位移(PGD)的震级标度关系。依据新建立的关系和实际数据分析认为,GPS峰值地动位移的震级标度关系适用于M_W5.6以上大地震的震级计算,并得到不同震级的地震使用该标度关系的震源距适用范围,提出使用场地校正项和震源辐射与传播路径校正项修正基于GPS峰值地动位移的震级标度关系。
A new magnitude scale relationship based on GPS peak geodynamic displacement(PGD) is constructed by synthesizing the magnitude formula of seismology and the results of current continuous GPS research on magnitude scale,using the peak geodynamic displacement data of 17 high-rate GPS stations with seismic events between M_W5.9 and 9.1 at home and abroad.According to the newly established relationship and the actual data analysis,it is considered that the magnitude scaling relation of GPS peak geodynamic displacement is suitable for magnitude calculation of larger earthquakes with M_W≥5.6,and the applicable range of focal distance for earthquakes with different magnitudes can be derived. This paper also presents that a wider range of the scaling relationship for estimating earthquake magnitude based on high-rate GPS' PGD can be obtained by using site correction,source radiation and propagation path correction.
A new magnitude scale relationship based on GPS peak geodynamic displacement(PGD) is constructed by synthesizing the magnitude formula of seismology and the results of current continuous GPS research on magnitude scale,using the peak geodynamic displacement data of 17 high-rate GPS stations with seismic events between M_W5.9 and 9.1 at home and abroad.According to the newly established relationship and the actual data analysis,it is considered that the magnitude scaling relation of GPS peak geodynamic displacement is suitable for magnitude calculation of larger earthquakes with M_W≥5.6,and the applicable range of focal distance for earthquakes with different magnitudes can be derived. This paper also presents that a wider range of the scaling relationship for estimating earthquake magnitude based on high-rate GPS' PGD can be obtained by using site correction,source radiation and propagation path correction.
引文
陈娜、龚涛、李萌等,2015,利用高频GPS反演强震面波震级的最优适用范围探讨,大地测量与地球动力学,35(3),512~516.
陈运泰、刘瑞丰,2004,地震的震级,地震地磁观测与研究,25(6),1~12.
陈运泰、吴忠良、李世愚,1997,世纪之交我国震源物理研究的进展与展望,地球物理学报,40(增刊I),164~176。
董娣,2006,地震动特性的影响因素与不确定性分析,博士学位论文,北京:北京工业大学。
顾铁、李萌、陈聪等,2015,基于高频GPS位移时序的芦山地震特性分析,科学技术与工程,15(16),128~133.
刘瑞丰、陈运泰、任枭等,2015,震级的测定,4~62,北京:地震出版社.
殷海涛、甘卫军、肖根如等,2009,利用高频GPS技术进行强震地面运动监测的研究进展,地球物理学进展,24(6),2012~2019.
赵仲和,2013,关于震级标度的讨论,国际地震动态,(2),16~20.
Crowell B W,Melgar D,Bock Y,et al,2013,Earthquake magnitude scaling using seismogeodetic data,Geophys Res Lett,40(23),6089~6094.
Fang R X,Shi C,Song W W,et al,2014,Determination of earthquake magnitude using GPS displacement waveforms from real-time precise point positioning,Geophys J Int,196(1),461~472.
Hall P,1990,Using the bootstrap to estimate mean squared error and select smoothing parameter in nonparametric problems,JMultivar Anal,32(2),177~203.
Lee S J,Komatitsch D,Huang B S,et al,2009,Effects of topography on seismic-wave propagation:An example from northern Taiwan,Bull Seismol Soc Am,99(1),314~325.
Melgar D,Crowell B W,Geng J H,et al,2015,Earthquake magnitude calculation without saturation from the scaling of peak ground displacement,Geophys Res Lett,42(13),5197~5205.
Michel C,Kelevitz K,HouliéN,et al,2017,The potential of high-rate GPS for strong ground motion assessment,Bull Seismol Soc Am,107(4),1849~1859.
(1)http://www-gpsg.mit.edu/~simongtgkdocs.html
陈运泰、刘瑞丰,2004,地震的震级,地震地磁观测与研究,25(6),1~12.
陈运泰、吴忠良、李世愚,1997,世纪之交我国震源物理研究的进展与展望,地球物理学报,40(增刊I),164~176。
董娣,2006,地震动特性的影响因素与不确定性分析,博士学位论文,北京:北京工业大学。
顾铁、李萌、陈聪等,2015,基于高频GPS位移时序的芦山地震特性分析,科学技术与工程,15(16),128~133.
刘瑞丰、陈运泰、任枭等,2015,震级的测定,4~62,北京:地震出版社.
殷海涛、甘卫军、肖根如等,2009,利用高频GPS技术进行强震地面运动监测的研究进展,地球物理学进展,24(6),2012~2019.
赵仲和,2013,关于震级标度的讨论,国际地震动态,(2),16~20.
Crowell B W,Melgar D,Bock Y,et al,2013,Earthquake magnitude scaling using seismogeodetic data,Geophys Res Lett,40(23),6089~6094.
Fang R X,Shi C,Song W W,et al,2014,Determination of earthquake magnitude using GPS displacement waveforms from real-time precise point positioning,Geophys J Int,196(1),461~472.
Hall P,1990,Using the bootstrap to estimate mean squared error and select smoothing parameter in nonparametric problems,JMultivar Anal,32(2),177~203.
Lee S J,Komatitsch D,Huang B S,et al,2009,Effects of topography on seismic-wave propagation:An example from northern Taiwan,Bull Seismol Soc Am,99(1),314~325.
Melgar D,Crowell B W,Geng J H,et al,2015,Earthquake magnitude calculation without saturation from the scaling of peak ground displacement,Geophys Res Lett,42(13),5197~5205.
Michel C,Kelevitz K,HouliéN,et al,2017,The potential of high-rate GPS for strong ground motion assessment,Bull Seismol Soc Am,107(4),1849~1859.
(1)http://www-gpsg.mit.edu/~simongtgkdocs.html
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