Seismic Sensor Misorientation Measurement Using P-Wave Particle Motion: An Application to the NECsaids Array

doi:10.1785/0220160005

	Seismic Sensor Misorientation Measurement Using P-Wave Particle Motion: An Application to the NECsaids Array
	Wang, Xin 1; Chen, Qi-Fu 1; Li, Juan 1; Wei, Shengji 2,3
	2016-07-01
发表期刊	SEISMOLOGICAL RESEARCH LETTERS
卷号	87 期号:4 页码:901-911
文章类型	Article
摘要	Seismic sensor orientation is one of the most critical parameters for modern three-component seismological observation. However, this parameter is easily subject to error imposed by strong magnetic anomalies near the station or by human error in declination calibration. It is therefore very important to inspect and correct for sensor misorientation before utilizing three-component waveform data. In this study, we measured the epoch-dependent sensor misorientation for our temporary seismic array (NorthEast China Seismic Array to Investigate Deep Subduction, or NECsaids) by analyzing P-wave particle motions. We applied principal component analysis and the minimizing transverse energy method to study earthquakes with epicentral distance between 5 degrees and 90 degrees to estimate the sensor misorientation. Our results show high consistency with the direct gyrocompass measurements, with a correlation coefficient of 0.95. Our statistical analysis suggests that we can estimate robust sensor misorientation utilizing 10 earthquakes with high signal-to-noise ratio records and highly linear P-wave polarizations. We also find that the influence of anisotropy or a dipping interface produces a periodical pattern with back azimuth and is relatively small for our misorientation estimation. By analyzing the amplitude change of synthetic seismograms due to misorientation and taking into account the influence of anisotropy and dipping interfaces, as well as the measurement errors, we expect engineers to be able to orient seismic sensors with error smaller than 3 degrees.
WOS标题词	Science & Technology ; Physical Sciences
DOI	10.1785/0220160005
资助者	National Science Foundation of China(41130316 ; National Science Foundation of China(41130316 ; 41474041 ; 41474041 ; 41274065) ; 41274065) ; National Science Foundation of China(41130316 ; National Science Foundation of China(41130316 ; 41474041 ; 41474041 ; 41274065) ; 41274065)
关键词[WOS]	SH CONVERSIONS ; ANISOTROPY ; ORIENTATION ; MEDIA ; POLARIZATION ; STATIONS
收录类别	SCI
语种	英语
资助者	National Science Foundation of China(41130316 ; National Science Foundation of China(41130316 ; 41474041 ; 41474041 ; 41274065) ; 41274065) ; National Science Foundation of China(41130316 ; National Science Foundation of China(41130316 ; 41474041 ; 41474041 ; 41274065) ; 41274065)
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000378490100013
引用统计
文献类型	期刊论文
条目标识符	http://ir.iggcas.ac.cn/handle/132A11/53405
专题	地球与行星物理院重点实验室
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, 19 Beitucheng Western Rd, Beijing 100029, Peoples R China 2.Nanyang Technol Univ, EOS, 50 Nanyang Ave Block N2-01a-15, Singapore 639798, Singapore 3.Nanyang Technol Univ, Asian Sch Environm, 50 Nanyang Ave,Block N2-01a-15, Singapore 639798, Singapore
推荐引用方式 GB/T 7714	Wang, Xin,Chen, Qi-Fu,Li, Juan,et al. Seismic Sensor Misorientation Measurement Using P-Wave Particle Motion: An Application to the NECsaids Array[J]. SEISMOLOGICAL RESEARCH LETTERS,2016,87(4):901-911.
APA	Wang, Xin,Chen, Qi-Fu,Li, Juan,&Wei, Shengji.(2016).Seismic Sensor Misorientation Measurement Using P-Wave Particle Motion: An Application to the NECsaids Array.SEISMOLOGICAL RESEARCH LETTERS,87(4),901-911.
MLA	Wang, Xin,et al."Seismic Sensor Misorientation Measurement Using P-Wave Particle Motion: An Application to the NECsaids Array".SEISMOLOGICAL RESEARCH LETTERS 87.4(2016):901-911.