Research on seismic background noise in the Eastern Subbasin of the South China Sea

LIU Yanan; LIU Baohua; LIU Chenguang; HUA Qingfeng; YAN Wenhua

doi:10.16562/j.cnki.0256-1492.2020051501

Marine Geology & Quaternary Geology > 2021 > 41(2): 109-117. > DOI: 10.16562/j.cnki.0256-1492.2020051501

LIU Yanan, LIU Baohua, LIU Chenguang, HUA Qingfeng, YAN Wenhua. Research on seismic background noise in the Eastern Subbasin of the South China Sea[J]. Marine Geology & Quaternary Geology, 2021, 41(2): 109-117. DOI: 10.16562/j.cnki.0256-1492.2020051501

Citation:

PDF (5659 KB)

Research on seismic background noise in the Eastern Subbasin of the South China Sea

1.
College of Marine Geosciences, Ocean University of China, Qingdao 266100, China
2.
Key Laboratory of Marine Geology and Metallogeny, First Institute of Oceanography, MNR, Qingdao 266061, China
3.
Laboratory for Marine Geology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266061, China
4.
National Deep Sea Center, Ministry of Natural Resources of China, Qingdao 266100, China
5.
Seismological Bureau of Shaanxi Province, Xi'an 710068, China

More Information

Received Date: May 14, 2020
Revised Date: July 06, 2020
Available Online: April 07, 2021

Graphical Abstract

Abstract

Abstract

The intensity of background noise is an important factor that affects the observation of seismic stations. Acquiring the characteristics of the background noise is of great significance to the evaluation of the quality of the data recorded by the Ocean Bottom Seismometer (OBS) and the noise reduction of the recorded data. Using the Probability Density Function (PDF) method to obtain the probability distribution characteristics of the Power Spectral Density (PSD) of the recorded data and comparing them with the results of new high-noise model (NHNM) and new low-noise model (NLNM) is a favorable method to research the background noise level around the station. Based on the long-term observation data of a large-scale passive source OBS array in the South China Sea (SCS), the background noise in the SCS is studied by using the PDF method. Firstly, the background noise in the whole frequency band is analyzed and compared with that from other stations. It is found that the background noise in the ocean is greater than the NHNM in the microseisms and low frequency band, and far greater than the background noise of the land-based station in the whole frequency band, which indicates that the data quality of the OBS is poor. Secondly, the probability density distribution of the earthquakes and other signals in the observation process is summarized, and it is found that the teleseismic, near earthquake and data dropout signal have different dominant frequency bands respectively, which has important significance for subsequent filtering processing and quality inspection. Finally, the time variation characteristics of background noise are studied, and it is found that typhoon is the main cause of time variation in microseisms period.
- ocean bottom seismometer,
- South China Sea,
- background noise,
- probability density function

FullText(HTML)

References (28)

References

[1]	Agnew D C, Berger J. Vertical seismic noise at very low frequencies [J]. Journal of Geophysical Research, 1978, 83(B11): 5420-5424. doi: 10.1029/JB083iB11p05420
[2]	Berger J, Davis P, Ekström G. Ambient Earth noise: A survey of the global seismographic network [J]. Journal of Geophysical Research, 2004, 109: B11307. doi: 10.1029/2004JB003408
[3]	Webb S C. Broadband seismology and noise under the ocean [J]. Reviews of Geophysics, 1998, 36(1): 105-142. doi: 10.1029/97RG02287
[4]	Peterson J. Observations and modeling of seismic background noise[R]. U.S. Geological Survey Open File Report, 1993: 93-322.
[5]	McNamara D E, Buland R P. Ambient noise levels in the Continental United States [J]. Bulletin of the Seismological Society of America, 2004, 94(4): 1517-1527. doi: 10.1785/012003001
[6]	吴建平, 欧阳飚, 王未来, 等. 华北地区地震环境噪声特征研究[J]. 地震学报, 2012, 34(6):818-829. [WU Jianping, OUYANG Biao, WANG Weilai, et al. Ambient noise level of North China from temporary seismic array [J]. Acta Seismologica Sinica, 2012, 34(6): 818-829.
[7]	葛洪魁, 陈海潮, 欧阳飚, 等. 流动地震观测背景噪声的台基响应[J]. 地球物理学报, 2013, 56(3):857-868. [GE Hongkui, CHEN Haichao, OUYANG Biao, et al. Transportable seismometer response to seismic noise in vault [J]. Chinese Journal of Geophysics, 2013, 56(3): 857-868.
[8]	林彬华, 金星, 李军, 等. 台网噪声评估及其对气枪震源激发效果影响的研究[J]. 地震学报, 2017, 39(3):330-342, 451. [LIN Binhua, JIN Xing, LI Jun, et al. Station network ambient noise level evaluation and its influence on air gun source excitation effect [J]. Acta Seismologica Sinica, 2017, 39(3): 330-342, 451.
[9]	刘旭宙, 沈旭章, 张元生, 等. 基于噪声概率密度函数的地震计观测性能对比[J]. 地震学报, 2018, 40(4):461-470. [LIU Xuzhou, SHEN Xuzhang, ZHANG Yuansheng, et al. Comparison on different seismometers performance based on probability density functions [J]. Acta Seismologica Sinica, 2018, 40(4): 461-470.
[10]	Li C F, et al. Opening of the South China Sea and its implications for Southeast Asian tectonics since the late Mesozoic[R]. IODP Proposal, 2008.
[11]	Li C F, Li J B, Ding W W, et al. Seismic stratigraphy of the central South China Sea basin and implications for neotectonics [J]. Journal of Geophysical Research: Solid Earth, 2015, 120(3): 1377-1399. doi: 10.1002/2014JB011686
[12]	Li C F, Xu X, Lin J, et al. Ages and magnetic structures of the South China Sea constrained by deep tow magnetic surveys and IODP expedition 349 [J]. Geochemistry, Geophysics, Geosystems, 2014, 15(12): 4958-4983. doi: 10.1002/2014GC005567
[13]	Zhao M H, He E Y, Sibuet J C, et al. Postseafloor spreading volcanism in the central East South China Sea and its formation through an extremely thin oceanic crust [J]. Geochemistry, Geophysics, Geosystems, 2018, 19(3): 621-641. doi: 10.1002/2017GC007034
[14]	Lei J S, Zhao D P, Steinberger B, et al. New seismic constraints on the upper mantle structure of the Hainan plume [J]. Physics of the Earth and Planetary Interiors, 2009, 173(1-2): 33-50. doi: 10.1016/j.pepi.2008.10.013
[15]	Xia S H, Zhao D P, Sun J L, et al. Teleseismic imaging of the mantle beneath southernmost China: New insights into the Hainan plume [J]. Gondwana Research, 2016, 36: 46-56. doi: 10.1016/j.gr.2016.05.003
[16]	Liu C G, Hua Q F, Pei Y L, et al. Passive-source ocean bottom seismograph (OBS) array experiment in South China Sea and data quality analyses [J]. Chinese Science Bulletin, 2014, 59(33): 4524-4535. doi: 10.1007/s11434-014-0369-4
[17]	Laske G, Collins J A, Wolfe C J, et al. Probing the Hawaiian hot spot with new broadband ocean bottom instruments [J]. EOS Transactions American Geophysical Union, 2009, 90(41): 362-363. doi: 10.1029/2009EO410002
[18]	Toomey D R, Allen R M, Barclay A H, et al. The Cascadia initiative: A sea change in seismological studies of subduction zones [J]. Oceanography, 2014, 27(2): 138-150. doi: 10.5670/oceanog.2014.49
[19]	Stähler S C, Sigloch K, Hosseini K, et al. Performance report of the RHUM-RUM ocean bottom seismometer network around La Reunion, western Indian Ocean [J]. Advances in Geosciences, 2016, 41: 43-63. doi: 10.5194/adgeo-41-43-2016
[20]	Xiao H, Xue M, Yang T, et al. The characteristics of microseisms in South China Sea: results from a combined data set of OBSs, broadband land seismic stations, and a global wave height model [J]. Journal of Geophysical Research: Solid Earth, 2018, 123(5): 3923-3942. doi: 10.1029/2017JB015291
[21]	Collins J A, Vernon F L, Orcutt J A, et al. Broadband seismology in the oceans: Lessons from the ocean seismic network pilot experiment [J]. Journal of Geophysical Research, 2001, 28(1): 49-52. doi: 10.1029/2000GL011638
[22]	Crawford W C, Webb S C. Identifying and removing tilt noise from low-frequency (<0.1 Hz) seafloor vertical seismic data [J]. Bulletin of the Seismological Society of America, 2000, 90(4): 952-963. doi: 10.1785/0119990121
[23]	Dahm T, Tilmann F, Morgan J P. Seismic broadband ocean-bottom data and noise observed with free-fall stations: Experiences from long-term deployments in the North Atlantic and the Tyrrhenian Sea [J]. Bulletin of the Seismological Society of America, 2006, 96(2): 647-664. doi: 10.1785/0120040064
[24]	Araki E, Shinohara M, Sacks S, et al. Improvement of seismic observation in the ocean by use of seafloor boreholes [J]. Bulletin of the Seismological Society of America, 2004, 94(2): 678-690. doi: 10.1785/0120020088
[25]	Longuet-Higgins M S. A theory of the origin of microseisms [J]. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 1950, 243(857): 1-35.
[26]	Stephen R A, Spiess F N, Collins J A, et al. Ocean seismic network pilot experiment [J]. Geochemistry, Geophysics, Geosystems, 2003, 4: 1092. doi: 10.1029/2002GC000485
[27]	Bromirski P D, Duennebier F K, Stephen R A. Mid-ocean microseisms [J]. Geochemistry, Geophysics, Geosystems, 2005, 6: Q04009. doi: 10.1029/2004GC000768
[28]	Stutzman E, Roult G, Astiz L. Geoscope station noise levels [J]. Bulletin of the Seismological Society of America, 2000, 90(3): 690-701. doi: 10.1785/0119990025

Cited By

Get Citation

PDF

XML

Article views (1590) PDF downloads (32)

Turn off MathJax

Article Contents

Abstract

References

Research on seismic background noise in the Eastern Subbasin of the South China Sea

Abstract

References

Catalog

Links

About Journal

Contact Us

Research on seismic background noise in the Eastern Subbasin of the South China Sea

Abstract

References

Catalog

Links

About Journal

Contact Us

Export File

Citation

Format

Content