PDF Download HTML

[1]ZHANG Huai,NIE Zhaosheng,LIU Gang,et al.Determination of Three Parameters of the 2021 Maduo MW7.4 Earthquake Using High-rate BDS/GPS[J].Journal of Seismological Research,2023,46(02):216-225.[doi:10.20015/j.cnki.ISSN1000-0666.2023.0026]

Copy

Determination of Three Parameters of the 2021 Maduo M_W7.4 Earthquake Using High-rate BDS/GPS

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 46 Number of periods: 2023 02 Page number: 216-225 Column: Public date: 2023-06-01

Title:: Determination of Three Parameters of the 2021 Maduo M_W7.4 Earthquake Using High-rate BDS/GPS

Author(s):: ZHANG Huai¹; NIE Zhaosheng¹; LIU Gang¹; XIONG Wei¹; NI Yipeng¹; HUANG Jun²; (1.Institute of Seismology,China Earthquake Administration,Wuhan 430071,Hubei,China)(2.Helongjiang Provincial Gedogy and Mineral Resources Test and Application Inshitute,Harbin 150036,Heilongjiang,China)

Keywords:: BDS/GPS; PPP; crustal deformation monitoring; three parameters of an earthquake; Maduo earthquake

CLC:: P315.725

DOI:: 10.20015/j.cnki.ISSN1000-0666.2023.0026

Abstract:: The seismic time series of 10 high-rate GNSS stations during the 2021 Maduo M_W7.4 earthquake were acquired using GPS and BDS/GPS fusion PPP based on the GREAT program,and the velocity time series 30 minutes before the earthquake were obtained based on the variometric approach.The analysis found that the BDS/GPS relative to GPS velocity RMS values in the EW,NS and UP orientation can be improved by 14.8%,15.2% and 3.5% respectively.The seismic wave’s first arrival-time was extracted from the BDS/GPS time series of each station using the STA/LTA method,the location of the epicenter of the Maduo earthquake was(34.63°N,98.51°E),and the earthquake’s original time was 18:04:29(UTC),calculated from the time of first arrival of seismic waves at each station.This article refers to the time of the Maduo earthquake,using the Coordinated Universal Time.The epicenter of the Maduo earthquake calculated by GPS time series is(34.6°N,98.54°E),and the original time is 18:04:28.8.Using GPS and BDS/GPS peak ground displacement,the Maduo earthquake magnitude was inverted according to the empirical formula,and the obtained magnitudes were M_W7.36 and M_W7.34,respectively.The BDS/GPS magnitude was closer to the result published by GCMT.The results show that the BDS/GPS fusion PPP solution can improve the stability of time series and reduce noise,which can more realistically describe the surface displacement changes during the earthquake,thus improving the accuracy of the magnitude solution and providing better data support for earthquake early warning and post-earthquake rescue.

References:: 李良发.2019.高精度北斗数据处理及地形变监测应用[D].武汉:中国地震局地震研究所.
刘刚,聂兆生,方荣新,等.2014.高频GNSS形变波的震相识别:模拟实验与实例分析[J].地球物理学报,57(9):2813-2825.
王迪晋,王东振,赵斌,等.2022.2021年青海玛多M_W7.4地震GNSS同震形变场及其断层滑动分布[J].地球物理学报,65(2):537-551.
魏二虎,刘学习,王凌轩,等.2018.BDS/GPS组合精密单点定位精度分析与评价[J].武汉大学学报(信息科学版),43(11):1654-1660.
姚文敏,方荣新,王珍,等.2019.高频GNSS观测快速估计地震震级及其精度评估[J].大地测量与地球动力学,39(12):1249-1253.
尹昊,单新建,张迎峰,等.2018.高频GPS和强震仪数据在汶川地震参数快速确定中的初步应用[J].地球物理学报,61(5):1806-1816.
祝会忠,杨添宇,赵洪涛,等.2020.GNSS多系统精密单点定位方法与性能分析[J].测绘科学,45(12):1-7,21.
Allen R V.1978.Automatic earthquake recognition and timing from single traces[J].Bulletin of the Seismological Society of America,68(5):1521-1532.
Bilich A,Cassidy J F,Larson K M.2008.GPS seismology:application to the 2002 M_W7.9 denali fault earthquake[J].Bulletin of the Seismological Society of America,98(2):593-606.
Blewitt G,Kreemer C,Hammond W,et al.2006.Rapid determination of earthquake magnitude using GPS for tsunami warning systems[J].Geophysical Research Letters,33(11):L11309.
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[J].Geophsical Journal International,196(1):461-472.
Fang R X,Zheng J W,Geng J H,et al.2020.Earthquake magnitude scaling using peak ground velocity derived from high-rate GNSS observations[J].Seismological Research Letters,92(1):227-237.
Gao Z Y,Li Y C,Shan X J,et al.2022.Testing a prototype earthquake early warning system:A retrospective study of the 2021 M_W7.4 Maduo,Tibet,earthquake[J].Seismological Research Letters,93(3):1650-1659.
Gutenberg B.1945.Amplitudes of surface waves and magnitudes of shallow earthquakes[J].Bulletin of the Seismological Society of America,35(1):3-12.
Hanks T C,Kanamori H.1979.A moment magnitude scale[J].Journal of Geophysical Research,84(B5):2348-2350.
Kanamori H.1977.The energy release in great earthquakes[J].Journal of Geophysical Research,82(20):2981-2987.
Li X X,Zhang X H,Ren X D,et al.2015.Precise positioning with current multi-constellation Global Navigation Satellite Systems:GPS,GLONASS,Galileo and BeiDou[J].Scientific Reports,5(1):8328.
Li X X,Zhu Y T,Zheng K,et al.2020.Precise orbit and clock products of Galileo,BDS and QZSS from MGEX since 2018:comparison and PPP validation[J].Remote Sensing,12(9):1415.
Melgar D,Crowell B W,Geng J H,et al.2015.Earthquake magnitude calculation without saturation from the scaling of peak ground displacement[J].Geophysical Research Letters,42(13):5197-5205.
Richter C F.1935.An instrumental earthquake magnitude scale[J].Bulletin of the Seismological Society of America,25(1):1-32.
Shu Y M,Fang R X,Geng J H,et al.2018.Broadband velocities and displacements from integrated GPS and accelerometer data for high-rate seismogeodesy[J].Geophysical Research Letters,45(17):8939-8948.
Somerville P G,Smith N F,Graves R W,et al.1997.Modification of empirical strong ground motion attenuation relations to include the amplitude and duration effects of rupture directivity[J].Seismological Research Letters,68(1):199-222.

Similar References:

Memo

Last Update: 2023-03-10