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http://dx.doi.org/10.5467/JKESS.2022.43.1.188

Bedrock Depth Variations and Their Applications to identify Blind Faults in the Pohang area using the Horizontal-to-Vertical Spectral Ratio (HVSR)  

Kang, Su Young (Institute of Geologic Hazard & Industrial Resources, Pusan National University)
Kim, Kwang-Hee (Department of Geological Science, Pusan National University)
Publication Information
Journal of the Korean earth science society / v.43, no.1, 2022 , pp. 188-198 More about this Journal
Abstract
Some deep faults do not reach the ground surface and are seldom recognized. Gokgang Fault area in the east of the Heunghae area of the Pohang basin has been selected to confirm the feasibility of the Horizontal-to-Vertical Spectral Ratio (HVSR) approach to identify blind faults. Densely spaced microtremor data have been acquired along two lines in the study area and processed to obtain resonance frequencies. An empirical relationship between the resonance frequency and the bedrock depth was proposed using borehole data available in the study area. Resonance frequencies along two lines were then converted to bedrock depths. The resulting depth profiles show significant lateral variations in the bedrock depth. As expected, considerable variation in the resonance frequency is observed near the Gokgang fault. The depth profiles also present additional significant variations in the resonance frequencies and the bedrock depths. The feature is presumably related to a blind fault that is previously unknown. Therefore, this case study confirms the feasibility of the HVSR technique to identify faults otherwise not recognized on the surface.
Keywords
HVSR; blind fault; fault structure; bedrock depth;
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Times Cited By KSCI : 5  (Citation Analysis)
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1 Kang, S. Y., Kim, K.-H., Chiu, J.-M. and Liu, L., 2020a. Microtremor HVSR analysis of heterogeneous shallow sedimentary structures at Pohang, South Korea. Journal of Geophysics and Engineering DOI: https://doi.org/10.1093/jge/gxaa035.   DOI
2 Teves-Costa, P., Matias, L., Oliveira, C.S., and Mendes-Victor, L.A., 1996. Shallow crustal models in the Lisbon area from explosion data using body and surface wave analysis, Tectonophysics, 258, 171-193.   DOI
3 Tuncel, A. and Akgun, M., 2016. Obtaining the Ground Seismic Vulnerability Indexes Using Microtremor Method, 2016 International conference on engineering and natural sciences, Saragevo, 24-28 May 2016, 369-373.
4 Kang, S.Y., Kim, K.H., Kim, D.Y., Jeon, B.Y., and Lee, J.W., 2020b. Effects of meterological variations and sensor burial depth on HVSR analysis. Journal of Korean Earth Science Society, 46(6), 658-669. DOI: https://doi.org/10.5467/JKESS.2020.41.6.658   DOI
5 Chatelain, J.-L., Guillier, B., Cara, F., Duval, A.-M., Atakan, K., and Bard, P.-Y., The WP02 SESAME team, 2008. Evaluation of the influence of experimental conditions on H/V results from ambient noise recordings, Bull Earthquake Eng, 6, 33-74.   DOI
6 Ahn, J.K., Cho, S., Jeon, Y.S. and Lee, D.K., 2018, Response characteristics of site-specific using aftershock event. Journal of the Korean Geotechnical Society, 34. 51-64. (in Korean)
7 Lee, H., Kim, R. and Kang, T.-S., 2017. Seismic Response from Microtremor of Chogye Basin, Korea. Geophysics and Geophysical Exploration 20, 88-95 DOI: https://doi.org/10.7582/GGE.2017.20.2.088. (in Korean)   DOI
8 Bignardi, S., Mantovani, A. and AbuZeid, N., 2016. OpenHVSR: imaging the subsurface 2D/3D elastic properties through multiple HVSR modeling and inversion. Computers & Geosciences 93, 103-113 DOI: http://dx.doi.org/10.1016/j.cageo.2016.05.009.   DOI
9 Hassani, B. and Atkinson, G. M., 2016. Applicability of the Site Fundamental Frequency as a VS30 Proxy for Central and Eastern North America. Bull. Seismol. Soc. Am. 106, 653-664 DOI: https://www.doi.org/10.1785/0120150259.   DOI
10 Kagami, H., Okada, S., Shiono, K., Oner, M., Dravinski, M., and Mal, A. K., 1986. Observation of 1- to 5-second microtremors and their application to eartquake engineering. Part III. A two-dimensional study of site effects in the San Fernado Valley, Bulletin of the Seismological Society of America, 76(6), 1801-1812.   DOI
11 Khalili, M., and Mirzakurdeh, A.V., 2019. Fault detection using microtremor data (HVSR-based approach) and electrical resistivity survey, Journal of Rock Mechanics and Geotechnical Engineering 11(2019) 400-408. https://doi.org/10.1016/j.jrmge.2018.12.003.   DOI
12 KIGAM, 2020, Geological Map of Korea, https://mgeo.kigam.re.kr/ (March 10th 2020)
13 Kim, J.-K., 2009. Analysis of site amplification of seismic stations using Odesan earthquake, Earthquake Engineering Society of Korea, 13, 27-34. (in Korean)   DOI
14 Field, E.H. and Jacob, K., 1993. The theoretical response of sedimentary layers to ambient seismic noise. Geophysical Research Letters, 20-24, 2925-2928.   DOI
15 Bottelin, P., Dufrechou, G., Seoane, L., Llubes, M., and Monod, B., 2019. Geophysical methods for mapping Quaternary sediment thickness: Application to the Saint-Lary basin (French Pyrenees), Comptes rendus-Geoscience, 351, 407-419.   DOI
16 Castellaro, S. and Mulargia, F., 2009. Vs30 Estimates using constrained H/V measurement. Bulletin of the Seismological Society of America, 99, 761-773.   DOI
17 Chen, Q., Liu, L., Wang, W., and Rohrbach, E., 2009. Site effects on earthquake ground motion based on microtremor measurements for metropolitan Beijing, Chinese Science Bulletin, 54(2), 280-287.
18 Geological Society of Korea, 2019. Summary Report of the Korean Government Commission on Relations between the 2017 Pohang Earthquake and EGS Project, p. 127.
19 Nakamura, Y., 1989. A Method for Dynamic Characteristics Estimation of Subsurface using Microtremor on the Ground Surface. Quarterly Report of Railway Technology Research Institute. 30, 25-33.
20 KMA (Korea Meteorological Administration), 2021. Weather data open portal, https://data.kma.go.kr/cmmn/main.do (October 26th 2021)
21 Konno, K. and Ohmachi, T., 1998. Ground-motion characteristics estimated from spectral ratio between horizontal and vertical components of ambient noise. Bull. Seismol. Soc. Am. 88, 228-241.   DOI
22 Ohmachi, T., Nakamura, Y., and Toshinawa, T., 1991. Ground motion characteristics of the San Francisco Bay area detected by microtremor measurements, Proc. of the 2nd International Conf. on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics, March 1991, 1643-1648.
23 Nakamura, Y. 2019. What is the Nakamura Method?, Seismological Research letters, 90, 1437-1443.
24 Parolai, S., Bormann, P., and Milkereit, C., 2002. New relationship between Vs, thickness of sediments, and rsonance frequency calculated by the H/V ratio of seismic noise for the Colongne Area (Germany), Bulletin of the Seismological Society of America, 92, 2521-2527.   DOI
25 Geopsy Group, 2019. Geopsy Package Release 3.2.0, http://www.geopsy.org/ (March 3th 2019).
26 Assatourians, K. and Atkinson, G., 2010. Database of processed time series and response spectra data for Canada: An exmaple application to study of 2005 MN 5.4 Riviere du Loup, Quebec, Earthauke, Seismological Research Letters, 81, 1013-1031.   DOI
27 Badrane, S., Bahi, L., Jabour, N. and Brahim, A. I., 2006. Seismic site effect estimation in the city of Rabat (Morocco). Journal of Geophysics and Engineering 3, 207-211 DOI: 10.1088/1742-2132/3/3/001.   DOI
28 Du, Y., Xu, P., Ling, S., Tian, B., You, Z., and Zhang, R., 2019. Determining the soil-bedrock interface and fracture-zone scope in the central urban area of the Jinan city, China, by using microtremor signals, Journal of Geophysics and Engineering, 16, 680-689. Doi:10.1093/jge/gxz040.   DOI
29 Haghshenas, E., Bard, P.-Y., Theodulidis, N., and SESAME WP04 Team, 2008. Empirical evaluation of microtremor H/V spectral ratio, Bull Earthquake Eng., 6: 75-108 DOI 10.1007/s10518-007-9058-x.   DOI
30 GIPS, 2019, Geotechnical Information Portal System,https://geoinfo.or.kr/index.do (May 30th 2019)
31 Hong, M.H. and Kim, K.Y., 2010. H/V Spectral-ratio Analysis of Microtremors in Jeju Island, Jigu-Mulli-wa-Mulli-Tamsa, 13(2), 144-152. (in Korean)
32 Sunaryo, 2017. Study of seismic vulnerability index (Kg) from dominant frequency (f0) and amplification factor (A0) by means of microzonation data: Case study on Batubesi dam of Nuha, East Luwu, South Sulawesi, Indonesia, 2017 International Seminar on Sensor, Instrumentation, Measurement and Metrology (ISSIMM), Surabaya, 78-81.
33 SESAME, 2004. Guidelines for the implementation of the H/V spectral ratio technique on ambient vibrations measurements, processing and interpretation, SESAME. Report No. Project No. EVG1-CT-2000-00026 SESAME.
34 Sohn, Y.K. and Son, M., 2004, Synrift stratigraphic geometry in a transfer zone coarse-grained delta complex, Miocene Pohang basin, SE Korea. Sedimentology, 51, 1387-1408.   DOI
35 Song, C. W., Son, M., Sohn, Y. K., Han, R., Shinn, Y. J. and Kim, J.-C., 2015. A study on potential geologic facility sites for carbon dioxide storage in the Miocene Pohang Basin, SE Korea. J. Geol. Soc. Korea 51, 53-66 DOI: 10.14770/jgsk.2015.51.1.53.   DOI
36 Theodulidis, N.P. and Bard, P.-Y., 1995. Horizontal to vertical spectral ratio and geological conditions: an anlysis of strong motion data from Greece and Taiwan (SMART-1), Soil Dynamics and Earthquake Engineering, 14, 177-197.   DOI
37 Yun, W.Y., Park, S.C. and Kim, K.Y., 2013. Comparison of background noise characteristics between surface and borehole station of Hwacheon, Jigu-Mulli-wa-Mulli-Tamsa, 16(4), 203-210. (in Korean)
38 Liu, L., Chen, Q., Wang, W. and Rohrbach, E., 2014, Ambient noise as the new source for urban engineering seismology and earthquake engineering: a case study from Beijing metropolitan area, Earthq Sci, 27, 89-100.   DOI
39 Yun, H.S., 1994. Emended Stratigraphy of the Miocene formations in the Pohang Basin, Part II: South of the Hyongsan Fault. Journal of the Paleontological Society of Korea, 10, 99-116.
40 Ibs-von Seht, M. and Wohlenberg, J., 1999. Microtremor measurements used to map thickness of soft sediments. Bulletin of the Seismological Society of America, 89, 250-259.   DOI