Abstract
Two moderate earthquakes (the 2016 Gyeongju and 2017 Pohang earthquakes with local magnitudes of 5.8 and 5.4, respectively) in Korea caused severe damage to buildings and grounds, raising attention to local seismic hazard assessments. However, ground motion amplifications owing to site effects have not been studied yet for Korea. In 2020, the Haenam swarm produced 74 earthquakes with local magnitudes ranging from 0.87 to 3.08, providing great opportunities to investigate single-path ground motion amplifications. We develop a local ground motion model for predicting within-rock motions using the records from nine borehole stations, and evaluate empirical amplification ratios at four surface stations based on a non-reference approach. We check that the peak periods from the horizontal-to-vertical spectral ratios agree well with those from the empirical amplification ratios. Based on the shear wave velocity profiles obtained from downhole tests and multichannel analyses of surface waves, we perform one-dimensional site response analyses for the four surface stations. The amplification ratios estimated from the site response analyses are comparable with those from the empirical approach for the periods shorter than 0.07 s, but not for the periods longer than 0.07 s, raising the necessity of detailed studies on dynamic properties of soils and rocks in Korea.
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References
Aaqib M, Park DH, Adeel MB, Hashash YMA, Ilhan O (2021) Simulation-based site amplification model for shallow bedrock sites in Korea. Earthq Spectra. https://doi.org/10.1177/8755293020981984
Ahn J-K, Kim B, Kwak D (2021a) Source and path effects of the ground motions recorded during the 2020 Haenam earthquake swarm in South Korea. Geosci J 25(1):83–92. https://doi.org/10.1007/s12303-020-0048-1
Ahn J-K, Kwak D, Kim H-S (2021b) Estimating VS30 at Korean Peninsular seismic observatory stations using HVSR of event records. Soil Dynamics and Earthquake Engineering, 146, https://doi.org/10.1016/j.soildyn.2021b.106650
Ahn JK, Cho S, Jeon YS, Lee DK (2018) Response characteristics of site-specific using aftershock event. Journal of the Korean Geotechnical Society 34(8):51–64 (in Korean)
Al Atik L, Abrahamson N (2010) An improved method for nonstationary spectral matching. Earthq Spectra 26(3):601–617. https://doi.org/10.1193/1.3459159
Bahari B, Hwang W, Kim T-H, Song Y-S (2020) Estimation of liquefaction potential in Eco-Delta City (Busan) using different approaches with effect of fines content. International Journal of Geo-Engineering 11(1):14. https://doi.org/10.1186/s40703-020-00121-4
Beck JL, Hall JF (1986) Factors contributing to the catastrophe in Mexico City during the earthquake of September 19, 1985. 13(6), 593-596, https://doi.org/10.1029/GL013i006p00593
Chi-Miranda MA, Montejo LA (2017) A numerical comparison of random vibration theory and time histories based methods for equivalent-linear site response analyses. International Journal of Geo-Engineering 8(1):22. https://doi.org/10.1186/s40703-017-0059-6
Choi Y, Stewart JP (2005) Nonlinear site amplification as function of 30 m shear wave velocity. Earthq Spectra 21(1):1–30. https://doi.org/10.1193/1.1856535
Chung SG, Giao PH, Kim GJ, Leroueil S (2002) Geotechnical properties of Pusan clays. Can Geotech J 39(5):1050–1060. https://doi.org/10.1139/t02-055
Darendeli MB (2001) Development of a new family of normalized modulus reduction and material damping curves. Ph.D.dissertation, Department of Civil, Architectural and Environmental Engineering. University of Texas at Austin, pp 1–394. http://hdl.handle.net/2152/10396
Field EH (2000) A modified ground-motion attenuation relationship for southern California that accounts for detailed site classification and a basin-depth effect. Bulletin of the Seismological Society of America, 90(S209-S221), https://doi.org/10.1785/0120000507
Finn WDL, Ventura CE, Wu G (1993) Analysis of ground motions at Treasure Island site during the 1989 Loma Prieta earthquake. Soil Dyn Earthq Eng 12(7):383–390. https://doi.org/10.1016/0267-7261(93)90001-8
Ghofrani H, Atkinson GM, Goda K (2013) Implications of the 2011 M9.0 Tohoku Japan earthquake for the treatment of site effects in large earthquakes. Bulletin of Earthquake Engineering 11(1):171–203. https://doi.org/10.1007/s10518-012-9413-4
Harmon J et al (2019) Site amplification functions for Central and Eastern North America – Part II: modular simulation-based models. Earthq Spectra 35(2):815–847. https://doi.org/10.1193/091117eqs179m
Hashash YMA, Park D (2002) Viscous damping formulation and high frequency motion propagation in non-linear site response analysis. Soil Dyn Earthq Eng 22(7):611–624. https://doi.org/10.1016/S0267-7261(02)00042-8
Hashash YMA, Musgrove MI, Harmon JA, Ilhan O, Xing G, Numanoglu O, Groholski DR, Phillips CA, Park D (2020) DEEPSOIL 7.0, User Manual. Board of Trustees of University of Illinois at Urbana-Champaign, Urbana, IL
Ito E, Nakano K, Nagashima F, Kawase H (2020) A method to directly estimate S-wave site amplification factor from horizontal-to-vertical spectral ratio of earthquakes (eHVSRs). Bull Seismol Soc Am 110(6):2892–2911. https://doi.org/10.1785/0120190315
Kang SY, Kim K-H, Chiu J-M, Liu L (2020) Microtremor HVSR analysis of heterogeneous shallow sedimentary structures at Pohang, South Korea. J Geophys Eng 17(5):861–869. https://doi.org/10.1093/jge/gxaa035
Kim K-H et al (2018) Assessing whether the 2017 Mw 5.4 Pohang earthquake in South Korea was an induced event. Science 360(6392):1007–1009. https://doi.org/10.1126/science.aat6081%JScience
Kim S, Hwang Y, Seo H, Kim B (2020) Ground motion amplification models for Japan using machine learning techniques. Soil Dyn Earthq Eng 132:106095. https://doi.org/10.1016/j.soildyn.2020.106095
Kwak DY, Seyhan E (2020) Two-stage nonlinear site amplification modeling for Japan with VS30 and fundamental frequency dependency. Earthq Spectra 36(3):1359–1385. https://doi.org/10.1177/8755293020907920
Kwok AOL et al (2007) Use of exact solutions of wave propagation problems to guide implementation of nonlinear seismic ground response analysis procedures. Journal of Geotechnical and Geoenvironmental Engineering 133(11):1385–1398. https://doi.org/10.1061/(ASCE)1090-0241(2007)133:11(1385)
Kwon Y, Yi MB, Yi CN (2009) The National Atlas of Korea. National Geographic Information Institute, Suwon 2009:45
Laurendeau A et al (2018) Derivation of consistent hard rock (1000 < VS < 3000 m/s) GMPEs from surface and down-hole recordings: analysis of KiK-net data. Bull Earthq Eng 16(6):2253–2284. https://doi.org/10.1007/s10518-017-0142-6
Lee S-H, Sun C-G, Yoon J-K, Kim D-S (2012) Development and verification of a new site classification system and site coefficients for regions of shallow bedrock in Korea. J Earthquake Eng 16(6):795–819. https://doi.org/10.1080/13632469.2012.658491
Park CB, Miller RD, Xia J (1998) Imaging dispersion curves of surface waves on multichannel record. SEG Technical Program Expanded Abstracts 1998. Soiciety of Exploration Geophysicists, 1377–1380
Park JY, Kim JM, Yoon SH (2015) Three-dimensional geologic modeling of the Pohang Basin in Korea for geologic storage of carbon dioxide. J Geol Soc Korea 51(3):289–302 (in Korean)
ParkSEIS (2016) Park Seismic LLC, 2 Balsam Circle, Shelton, USA
Seed HB, Romo MP, Sun JI, Jaime A, Lysmer J (1988) The Mexico Earthquake of September 19, 1985—Relationships between Soil Conditions and Earthquake Ground Motions. Earthq Spectra 4(4):687–729. https://doi.org/10.1193/1.1585498
SeismoMatch (2021) SeismoMatch (Version 2.1.0). Pavia, Italy: SeismoSoft
Seo JW, Lee DK (2020) Earthquake swarm events occurred in Haenam, Jeollanam-do, are not expected as a fore-earthquake of the big one. Korea Meteorological Administration Press Release (2 June, 2020) (In Korean)
Seyhan E, Stewart JP (2014) Semi-empirical nonlinear site amplification from NGA-West2 data and simulations. Earthq Spectra 30(3):1241–1256. https://doi.org/10.1193/063013eqs181m
Spudich P, Iida M (1993) The seismic coda, site effects, and scattering in alluvial basins studied using aftershocks of the 1986 North Palm Springs, California, earthquake as source arrays. Bull Seismol Soc Am 83(6):1721–1743. https://doi.org/10.1785/BSSA0830061721
Xia J, Miller RD, Park CB (1999) Estimation of near-surface shear-wave velocity by inversion of Rayleigh waves. Geophysics 64(3):691–700. https://doi.org/10.1190/1.1444578
Acknowledgements
This work was supported by the Korea Meteorological Administration Research and Development Program under Grant KMI (PJ0013282021) and the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (NRF-2020R1C1C1013317). The authors would like to thank the two anonymous reviewers for their insightful comments, which helped us improve the manuscript.
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Kwak, D., Ahn, JK., Seo, H. et al. Single-path ground motion amplifications during the 2020 Haenam, South Korea, swarm. Bull Earthquake Eng 20, 4937–4959 (2022). https://doi.org/10.1007/s10518-022-01386-z
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DOI: https://doi.org/10.1007/s10518-022-01386-z