Abstract
When data is available, the estimation of site effects is usually performed using the “standard spectral ratio” (SSR) technique with respect to an outcropping, reference rock site. This study uses the Japanese KiK-net network, which has more than 600 pairs of surface-downhole stations allowing the computation of empirical borehole transfer functions, consisting of mean spectral ratios of surface over downhole recordings. The borehole transfer function deviates from the SSR in two respects: the reference is located at depth, and the downhole velocity varies from one site to another. These differences bias the estimation of the transfer function with reference to a standard outcrop rock site. The goal of this paper is to develop a simple and robust methodology to correct for such bias. The proposed correction procedure consists of two steps: a depth correction designed to account, in a simplified and physically acceptable way, for the existence at depth of destructive interferences and the absence of free-surface effects in the high-frequency range; and an impedance correction designed to normalize the shear wave velocity at depth. The depth correction involves a simple, frequency-dependent curve to be adapted for each site as a function of the first destructive interference frequency at depth. The impedance normalization combines the use of “generic” rock velocity profiles and a quarter-wavelength approach, resulting in a smooth frequency-dependent amplitude correction. The proposed methodology is applied on a large subset of KiK-net data in view of analysing the correlation between site amplification factors and site parameters in a companion paper.
Similar content being viewed by others
References
Abercrombie RE (1997) Near-surface attenuation and site effects from comparison of surface and deep borehole recordings. Bull Seismol Soc Am 87(3): 731–744
Aoi S, Obara K, Hori S, Kasahara K, Okada Y (2000) New Japanese uphole/downhole, strong-motion observation network: kiknet. Seismol Res Lett 72: 239
Archuleta R, Seale SH, Sangas PV, Baker LM, Swain ST (1992) Garner Valley downhole array of accelerometers: instrumentation and preliminary data analysis. Bull Seismol Soc Am 82: 1592–1621
Assimaki D, Li W, Steidl JH, Tsuda K (2008) Site amplification and attenuation via downhole array seismogram inversion: a comparative study of the 2003 Miyagi-Oki, aftershock sequence. Bull Seismol Soc Am 98(1): 301–330. doi:10.1785/0120070030
Bard P-Y, Gariel J-C (1986) The seismic response of two-dimensional sedimentary deposits with large vertical velocity gradients. Bull Seismol Soc Am 76(2): 343–346
Beresnev IA, Wen K-L (1996) The accuracy of soil response estimates using soil-to-rock spectral ratios. Bull Seismol Soc Am 86(2):519–523, April 1996, Short Notes
Bonilla LF, Steidl JH, Lindley GT, Tumarkin AG, Archuleta RJ (1997) Site amplification in the San Fernando Valley, California: variability of site-effect estimation using the shear wave, Coda, and H/V methods. Bull Seismol Soc Am 87(3): 710–730
Bonilla LF, Steidl JH, Gariel J-C, Archuleta RJ (2002) Borehole response studies at the Garner Valley Downhole Array, Southern California. Bull Seismol Soc Am 92: 3165–3179
Boore DM (2003) Simulation of ground motion using the stochastic method. Pure Appl Geophys 160: 635–676
Boore DM, Joyner WB (1997) Site amplifications for generic rock sites. Bull Seismol Soc Am 74(5): 2035–2039
Borcherdt RD (1970) Effect on local geology on ground motion near San Francisco bay. Bull Seismol Soc Am 60: 29–61
Cadet H (2007) Utilisation combine des méthodes basées sur le bruit de fond dans le cadre du microzonage sismique. Doctoral thesis of the Université Joseph Fourier, Grenoble
Cadet H, Bard P-Y, Rodriguez-Marek A (2010) Defining a standard rock: proposition based on the KiK-net database. Bull Seismol Soc Am 100(1): 172–195. doi:10.1785/0120090078
Chávez-García FJ, Raptakis D, Makra K, Pitilakis K (2002) Importance of the reference station in modeling site effects up to larger frequencies. The case of Euroseistest. In: 12th European conference on earthquake engineering, paper reference 589, London
Cotton F, Pousse G, Bonilla LF, Scherbaum F (2008) On the discrepancy of recent European ground motion observation and predictions from empirical models. Analysis of KIKnet accelerometric data and point source stochastic simulations. Bull Seismol Soc Am 98(5): 2244–2261
EN 1998-1, Eurocode 8 (1998) Design of structures for earthquake resistance- Part 1: general rules, seismic actions and rules for buildings. EN 1998, European committee for standardization
Field EH (1996) Spectral amplification in a sediment-filled valley exhibiting clear basin-edge-induced waves. Bull Seismol Soc Am 86: 991–1005
Fujiwara H, Aoi S, Kunugi T, Adachi S (2004) Strong-Motion Observation Networks of NIED: K-NET and KIK-net. http://www.cosmos-eq.org/Projects/Fujiwara_paper.pdf, abstract
Kawase H (2006) Borehole observations for site effect studies. In: Third international symposium on the effects of surface geology on seismic motion Grenoble, France, vol 1, pp 3–20, 30 August to 1 September 2006
Kennett BLN (1974) Reflections, rays, and reverberations. Bull Seismol Soc Am 64(6): 1685–1696
Kinoshita S (1998) Kyoshin Net (K-NET). Bull Seismol Soc Am 69(4): 309–332
Kokusho T, Sato K (2008) Surface-to-base amplification evaluated from KiK-net vertical array strong motion records. Soil Dyn Earthq Eng 28(9): 707–716
Konno K, Ohmachi T (1998) Ground-motion characteristics estimated from spectral ratio between horizontal and vertical components of microtremor. Bull Seismol Soc Am 88(1): 228–241
Lachet C, Hatzfeld D, Bard P-Y, Papaioannou NC, Savvaidis A (1996) Effects and microzonation in the city of Thessaloniki (Greece)—comparison of different approaches. Bull Seismol Soc Am 86(6): 1692–1703
Lermo J, Chavez-Garcia FJ (1993) Site effect evaluation using spectral ratios with only one station. Bull Seismol Soc Am 83(5): 1574–1594
Marrara F, Suhadolc P (2001) 2D modeling of site effect along the EURO-SEISTEST array (Volvi Graben, Greece). Pure Appl Geophys 158: 2369–23688
Malagnini L, Mayeda K, Akinci A, Bragato PL (2004) Estimating absolute site effects. Bull Seismol Soc Am 94(4): 1343–1352
Oth A, Bindi D, Parolai S, Di Giacomo D (2011) Spectral analysis of K-NET and KiK-net Data in Japan, Part II: On attenuation characteristics, source spectra, and site response of borehole and surface stations. Bull Seismol Soc Am 101(2): 667–687. doi:10.1785/0120100135
Pousse G (2005) Analyse des données accélérométriques de K-net et KIK-net: Implications sur la prédiction du mouvement sismique—accélérogrammes et spectres de réponse – et la prise en compte des effets de site non-linéaires. Ph.D. Thesis, University Joseph Fourier, Grenoble I, October 2005, 238 pages (in French)
Raptakis D, Chavez-Garcia FJ, Makra K, Pitilakis K (2000) Site effects at Euroseistest—I. Determination of the valley structure and confrontation of observations with 1D analysis. Soil Dyn Earthq Eng 19: 1–22
Steidl JH, Tumarkin AG, Archuleta RJ (1996) What is a reference site?. Bull Seismol Soc Am 86(6): 1733–1748
Theodulidis N, Bard P-Y (1995) Horizontal to vertical spectral ratio and geological conditions—an analysis of strong ground motion data from Greece and Taiwan (smart-1). Soil Dyn Earthq Eng 14(3): 177–197
Theodulidis N, Bard P-Y, Archuleta R, Bouchon M (1996) Horizontal-to-vertical spectral ratio and geological conditions: the case of Garner Valley Downhole Array in southern California. Bull Seismol Soc Am 86(2): 306–319
Thompson EM, Baise LG, Kayen RE, Guzina BB (2009) Impediments to predicting site response: seismic property estimation and modeling simplifications. Bull Seismol Soc Am 99(5): 2927–2949
Yu J, Haines J (2003) The choice of reference sites for seismic ground amplification analyses: case study at Parkway, New Zealand. Bull Seismol Soc Am 93-2: 713–723
Zhao JX (2006) An empirical site classification method for strong motion station in Japan using H/V response spectral ratio. Bull Seismol Soc Am 96(3): 914–925
Author information
Authors and Affiliations
Corresponding author
Additional information
An erratum to this article can be found at http://dx.doi.org/10.1007/s10518-011-9323-x.
Rights and permissions
About this article
Cite this article
Héloïse, C., Bard, PY. & Rodriguez-Marek, A. Site effect assessment using KiK-net data: Part 1. A simple correction procedure for surface/downhole spectral ratios. Bull Earthquake Eng 10, 421–448 (2012). https://doi.org/10.1007/s10518-011-9283-1
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10518-011-9283-1