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Crustal Structure Beneath Korea Seismic Stations (Inchon, Wonju and Pohang) Using Receiver function  

Kim, So-Gu (한양대학교 지구해양과학과)
Lee, Seung-Kyu (한국지진연구소)
Publication Information
Journal of the Korean Society of Hazard Mitigation / v.4, no.4, 2004 , pp. 43-54 More about this Journal
Abstract
The broadband receiver functions are developed from teleseismic P waveforms recorded at Wonju(KSRS), Inchon(IRIS), and Pohang(PHN), and are analyzed to examine the crustal structure beneath these stations. The teleseismic receiver functions are inverted in the time domain of the vertical P wave velocity structures beneath the stations. Clear P-to-S converted phases from the Moho interface are observed in teleseismic seismograms recorded at these stations. The crustal velocity structures beneath the stations are estimated by using the receiver function inversion method(Ammon et al., 1990). The general features of inversion results are as follows: (1) For the Inchon station, the Conrad discontinuity exists at 17.5 Km(SW) deep and the Moho discontinuity exists at 29.5 Km(NW) and 30.5 Km(SE, SW) deep. (2) The shallow crustal structure beneath Wonju station may be covered with a sedimentary rock of a 3 Km thickness. The average Moho depth is assumed about 33.0 Km, and the Conrad discontinuity may exist at 17.0 Km(NE) and 21.0 Km(NW) deep. (3) For Pohang station, the thickness of shallow sedimentary layer is a 3.0 Km in the direction of NE and NW. The Moho depth is 28.0 Km in the direction of the NE and NW. The Conrad discontinuity can be estimated to be existed at 21.0 Km deep for the NE and NW directions.
Keywords
broadband receiver function; Ps conversion; Moho discontinuity;
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  • Reference
1 Cho J.D., J.H. Choi, M.T. Lim, I.H. Park, and I. S. Ko, A study on the regional gravity anomaly (southern part of Korean Peninsula), KIGAM Research Report (KR-96(c)-S), 27p (in Korean), 1996
2 Herrmann, R. B., Computer Programs in Seismology, Saint Louis University, 1994
3 Kennett, B. L. N., Seismic Wave Propagation in Stratified Media, Cambridge University Press, New York, 342, 1983
4 Kim S. K. and B. H. Jung, Crustal structure of the southern part of Korea, J. KoreanMining Geol., 18. 151 - 157 (in Korean), 1985
5 Langston, C. A., The effect of planar dipping structure on source and receiver responses for constant ray parameter, Bull. Seism Soc. Am., 67, 1029-1050, 1977b
6 Langston, C. A, Structure under Mount Rainier, Washington, inferred from teleseismic body waves, J. Geophys. Res., 84(B9), 4749-4762, 1979
7 Ozalaybey, S. , M.K. Savage, A.F. Sheehan, J.N. Louie, and J.N. Brune, Shear -Wave Velocity Structure in the Northern Basin and Range Province from the Combined Analysis of Receiver Functions and Surface Waves, Bull. Seism Soc. Am., 87(1), 183- 199, 1997
8 Peng, X. and E. D. Humphreys, Moho Dip Crustal Anisotropy in Northwestern Nevada from Teleseismic Receiver Functions, Bull. Seism Soc. Am., 87(3), 745-754, 1997
9 Priestly, K. F., G. Zandt, and G. E. Randall, Crustal structure in Eastern Kazakh, U.S.S.R. from teleseismic receiver functions, Geophys. Res. Lett., 15(6), 613 -616, 1988
10 Sheehan, A.F., G.A. Abers, C.H. Jones, and A.L. Lerner-Lam, Crustal thickness variations across the Colorado Rocky Mountain from teleseismic receiver functions, J. Geophys. Res., 100(B10), 20391-20404, 1995
11 Ammon, C. J., The isolation of receiver effects from telesiemic P waveforms, Bull. Seism. Soc. Am., 81(6), 2504-2510, 1991
12 Shaw, P. R., and J. A. Orcutt, Waveform inversion of seismic refraction data and applications to young Pacific crust, Geophys. J. R. Astron. Soc., 82, 375-414, 1985
13 Ammon, C. J., J. Zucca, and P. Kasameyer, An S-to-P converted phase recorded near Long Valley/Moho Craters Region, California, J. Geophys. Res., 94(B12), 17721-17727, 1989
14 Lee, D.Y. and J.Y. Kim, Quaternary Geology of the Pohang-Youngil Area, KIER-Research Report (KR-90-1A-2)(in Korean), 1990
15 Chung T. W., A quantitative study on the crustal structure of the Korean Peninsula, Jour. Korean Earth Society , 16, 152-157, 1995
16 Ammon, C., G. Randall, and G. Zandt, On the nonuniqueness of receiver function inversions, J. Geophys. Res., 95(B10), 15303-15318, 1990
17 Liu, Qiyuan and R. Kind, Lateral variations of the structure of the crustal-mantle boundary from conversions of teleseismic P waves, J. Geophysics, 60, 149-156, 1986
18 Haskell, N. A., Crustal reflection plane P and SV waves, J. Geophys. Res., 67, 4751 -4767, 1962
19 Owens, T. J. and R. S. Crosson, Shallow structure effects on broadband teleseismic P waveforms, Bull. Seism Soc. Am., 78(1), 96-108, 1988
20 Kim So Gu and Seoung Kyu Lee, Seismic velocity structure in the Central Korean Peninsula using the artificial explosions, Bull. Seis. Assoc. Far East, SAFE 2(1), 4-17, 1996
21 Zhang, J. and C. A. Langston, Dipping Structure under Dourbes, Belgium, Determined by Receiver Function Modeling and Inversion, Bull. Seism. Soc. Am., 85, 254-268, 1995
22 Zhu, L., T. J. Owens, and G. E. Randall, Lateral variation in crustal structure of the northern Tibetan Plateau inferred from teleseismic receiver functions, Bull. Seism. Soc. Am., 85(6), 1531-1540, 1995
23 Randall, G. E., Efficient calculation of differential seismograms for lithospheric receiver functions, Geophysical J. Int., 99, 469-481, 1989
24 Li, Qinghe, 3-D crustal velocity tomography in the southern part of South Korea, personal communication (unpublished technical report), 1997
25 Kim So Gu and Fuchun Gao, Korean Earthquake Catalogue, The Seismological Institute of Hanyang University, 98p., 1995
26 Kim So Gu and Seoung Kyu Lee, Crustal modelling for the southern parts of the Korean Peninsula using observational data and ray method, Kor. Inst Min and Energ. Res., 31, 549-558(in Korean), 1994
27 Owens, T. J., G. Zandt and S. R. Taylor, Seismic evidence for an ancient rift beneath the Cumberland Plateau, Tennessee: A detailed analysis of broadband teleseismic P waveforms, J. Geophys. Res., 89(B9), 7783-7795, 1984
28 Marc, R., Lateral Variation of Upper Mantle structure beneath New Caledonia determined from P-wave receiver function: evidence for a fossil subduction zone. Geophysical J. Int., 95,561-577, 1988
29 Owens, T. J., Crustal structure of the Adirondacks determined from broadband teleseismic waveform modeling, J. Geophys. Res., 92(B7), 6391-6401, 1987
30 Kim Sang Jo and So Gu Kim, A study on the crustal structure of south Korea by using seismic waves, J. Korean Inst. Mining Geol., 16,51-61(in Korean), 1983
31 Berteussen, K. A., Moho depth determinations based on spectral ratio analysis of NORSAR longperiod P waves, Phys. Earth Planet. Inter.,31, 313-326, 1977
32 Burdick, L. J. and C. A. Langston, Modeling crustal structure through the use of converted phases in teleseismic body -wave forms, Bull. Seism Soc. Am., 67(3), 677-691, 1977
33 Helmberger, D. and R. A. Wiggins, Upper mantle structure of midwestern United States, J. Geophys. Res., 76 (14), 3229 -3245, 1971
34 Langston, C. A., Corvallis, Oregon, crustal and upper mantle receiver structure from teleseismic P and S waves, Bull. Seism. Soc. Am., 67, 713-724, 1977a
35 McNamara, D. E. and T. J. Owens, Azimuthal shear wave velocity anisotropy in the basin and range province using moho Ps converted phases, J. Geophys. Res., 98 (B7), 12003-12017, 1993
36 Owens, T. J., S. R. Taylor, and G. Zandt, Crustal structure at regional seismic test network stations determined from inversion of broadband teleseismic P waveforms, Bull. Seism Soc. Am., 77(2), 631-662, 1987