Group velocity estimation of Rayleigh wave of crust and upper mantle based on the broadband seismic data in Vietnam East Sea

Hung Nguyen Tien, Giang Ha Thi, Minh Nguyen Le, Satoru Tanaka, Yasushi Ishihara, Long Ha Vinh, Khoi Le Quang
Author affiliations

Authors

  • Hung Nguyen Tien Institute of Geophysics, VAST Graduate University of Science and Technology, VAST
  • Giang Ha Thi Institute of Geophysics, VAST
  • Minh Nguyen Le Institute of Geophysics, VAST
  • Satoru Tanaka Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Japan
  • Yasushi Ishihara Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Japan
  • Long Ha Vinh Institute of Geophysics, VAST
  • Khoi Le Quang Institute of Geophysics, VAST

DOI:

https://doi.org/10.15625/1859-3097/17/4B/13008

Keywords:

Group velocity of Rayleigh, dispersion curve, multiple filter analysis.

Abstract

In this study, the Rayleigh wave group velocity (Vgr) of Vietnam East Sea is determined by using 36,195 broadband velocity seismograms recorded by 95 seismic stations from 381 events with magnitude larger than 6.0, depth lower than 100 km, from 2000 to 2016 and applying the multiple filter analysis, integrated into Computer Program Seismology (CPS) by Herrmann and Ammon (2002). Using 2,600 high quality dispersion curves of Vrg passing through the Vietnam East Sea, the results show that: (i) The dispersion curves of Vgr in the continent region have the function graph of grade 3 with a minimum (at Vrg ≈ 2.8 km/s; T = 20 - 26 s) and a maximum (at Vrg ≈ 3.9 km/s; T = 50 - 90 s) and the dispersion curves of Vgr in the ocean have the function graph of grade 2 with a maximum (≈ 3.9 km/s; T = 40 - 90 s); (ii) At the period lower than 40s, the Vrg in Vietnam East Sea is from 2.8 km/s to 4.0 km/s and reaches a maximum at the center area; (iii) At the period over 50s, the Vrg in Vietnam East Sea is from 3.2 km/s to 4.2 km/s and the low Vgr area appears along the Red river, Con Co island, Dai Loan island, Visayas, Philippines and Borneo island.

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References

Ewing, M., and Press, F., 1952. Crustal structure and surface-wave dispersion. part II Solomon Islands earthquake of July 29, 1950. Bulletin of the Seismological Society of America, 42(4), 315-325.

Oliver, J., 1962. A summary of observed seismic surface wave dispersion. Bulletin of the Seismological Society of America, 52(1), 81-86.

Satô, Y., 1958. Attenuation, dispersion, and the wave guide of the G wave. Bulletin of the Seismological Society of America, 48(3), 231-251.

Pilant, W. L., and Knopoff, L., 1964. Observations of multiple seismic events. Bulletin of the Seismological Society of America, 54(1), 19-39.

Landisman, M., Dziewonski, A., and Sato, Y., 1969. Recent improvements in the analysis of surface wave observations. Geophysical Journal International, 17(4), 369-403.

Dziewonski, A., Bloch, S., and Landisman, M., 1969. A technique for the analysis of transient seismic signals. Bulletin of the seismological Society of America, 59(1), 427-444.

Herrmann, R. B., and Ammon, C. J., 2002. Computer programs in seismology: Surface waves, receiver functions and crustal structure. Saint Louis University, St. Louis, MO, USA.

Wier, S., 1982. Surface wave dispersion and Earth structure in south-eastern China. Geophysical Journal International, 69(1), 33-47.

Wu, F. T., and Levshin, A., 1994. Surface-wave group velocity tomography of East Asia. Physics of the Earth and Planetary interiors, 84(1-4), 59-77.

Tsai, Y. B., and Wu, H. H., 2000. S-wave velocity structure of the crust and upper mantle under southeastern China by surface wave dispersion analysis. Journal of Asian Earth Sciences, 18(3), 255-265.

Cao, X. L., Zhu, J. S., Zhao, L. F., Cao, J. M., and Hong, X. H., 2001. Three dimensional shear wave velocity structure of crust and upper mantle in South China Sea and its adjacent regions by surface waveform inversion. Acta Seismologica Sinica, 14(2), 117-128.

Wu, H. H., Tsai, Y. B., Lee, T. Y., Lo, C. H., Hsieh, C. H., and Van Toan, D., 2004. 3-D shear wave velocity structure of the crust and upper mantle in South China Sea (Vietnam East Sea) and its surrounding regions by surface wave dispersion analysis. Marine Geophysical Researches, 25(1-2), 5-27.

Tang, Q., and Zheng, C., 2013. Crust and upper mantle structure and its tectonic implications in the South China Sea (Vietnam East Sea) and adjacent regions. Journal of Asian Earth Sciences, 62,

-525.

Yang, T., Liu, F., Harmon, N., Le, K. P., Gu, S., and Xue, M., 2015. Lithospheric structure beneath Indochina block from Rayleigh wave phase velocity tomography. Geophysical Journal International, 200(3), 1582-1595.

Phùng Văn Phách, 2017. Cấu trúc địa chất và tiến hóa biển Đông trong Kainozoi. Nxb. Khoa học Tự nhiên và Công nghệ, 299 tr.

Knopoff, L., 1969. Phase and group slownesses in inhomogeneous media. Journal of Geophysical Research, 74(6), 1701-1701.

Fu‐Tian, L., Hua, W., Jian‐hua, L., Ge, H., Qiang, L., and Ke‐xin, Q., 1990. 3‐D velocity images beneath the Chinese continent and adjacent regions. Geophysical Journal International, 101(2), 379-394.

Rawlinson, N., 2008. Fast marching surface tomography. Research School of Earth Sciences, Australian National University, Canberra ACT, 22 p.

Sethian, J. A., 1996. A fast marching level set method for monotonically advancing fronts. Proceedings of the National Academy of Sciences, 93(4), 1591-1595.

He, L., Wang, K., Xiong, L., and Wang, J., 2001. Heat flow and thermal history of the South China Sea (Vietnam East Sea). Physics of the Earth and Planetary Interiors, 126(3-4), 211-220.

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Published

15-12-2017

How to Cite

Tien, H. N., Thi, G. H., Le, M. N., Tanaka, S., Ishihara, Y., Vinh, L. H., & Quang, K. L. (2017). Group velocity estimation of Rayleigh wave of crust and upper mantle based on the broadband seismic data in Vietnam East Sea. Vietnam Journal of Marine Science and Technology, 17(4B), 198–207. https://doi.org/10.15625/1859-3097/17/4B/13008

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