Effects of Failure of the Ocean-Bottom Seismograph Leveling System on Receiver Function Analysis

Tran Danh Hung1,3; Yang, Ting2; Ba Manh Le1; Yu, Youqiang1

2019-05-01

10.1785/0220180276

SEISMOLOGICAL RESEARCH LETTERS   影响因子和分区

0895-0695

1938-2057

A free-fall ocean-bottom seismograph (OBS) cannot always achieve the desired seismometer leveling because of the impact of the descending OBS with the seafloor and the complexities of the ocean bottom. How a failure of the leveling system of OBS affects seismic applications, especially those relying on three-component seismograms such as the receiver function (RF), needs to be carefully explored. Here, we investigate the effects of a tilted seismometer on the RF analysis using data from a passive-source OBS experiment in the South China Sea. The back azimuth-dependent, negative polarity of P signature observed on RF traces of two OBSs can only be explained by tilted seismometers. Analyses of tilt noise independently confirm that seismometers in these two OBSs were permanently tilted. By correcting the tilt, we are able to greatly enhance the signals of the Moho-associated P-to-S-converted phases on the RFs.

SCI ; EI

英语

通讯

National Program on Global Changing and Air-Sea Interaction[GASI-GEOGE-05]

Geochemistry & Geophysics

Geochemistry & Geophysics

WOS:000465502500013

SEISMOLOGICAL SOC AMER

20193407351259

Failure (mechanical) ; Leveling (machinery) ; Seismology

Earthquake Measurements and Analysis:484.1 ; Machine Tools, General:603.1

GEOSCIENCES

Web of Science

1.Tongji Univ, State Key Lab Marine Geol, 1239 Siping Rd, Shanghai 200092, Peoples R China
2.Southern Univ Sci & Technol SUSTech, Dept Ocean Sci & Engn, 1088 Xueyuan Rd, Shenzhen 518055, Peoples R China
3.Hanoi Univ Min & Geol, Dept Geophys, 18 Pho Vien Rd, Hanoi 100000, Vietnam

Tran Danh Hung,Yang, Ting,Ba Manh Le,et al. Effects of Failure of the Ocean-Bottom Seismograph Leveling System on Receiver Function Analysis[J]. SEISMOLOGICAL RESEARCH LETTERS,2019,90(3):1191-1199.

Tran Danh Hung,Yang, Ting,Ba Manh Le,&Yu, Youqiang.(2019).Effects of Failure of the Ocean-Bottom Seismograph Leveling System on Receiver Function Analysis.SEISMOLOGICAL RESEARCH LETTERS,90(3),1191-1199.

Tran Danh Hung,et al."Effects of Failure of the Ocean-Bottom Seismograph Leveling System on Receiver Function Analysis".SEISMOLOGICAL RESEARCH LETTERS 90.3(2019):1191-1199.