Total views : 324
A Comparison on Efficiency of Triangular and Orthogonal Arrays in Determination of Shear Wave Velocity Profile of the Layers Close to the Earth Surface using F-K Method
In order to assess and compare efficiency of triangular and orthogonal arrays in identification of subsurface structure specifications up to a depth of 50 meters using microtremor waves by F-K method, two triangular and orthogonal arrays with 13 and 12 stations (which included some sub-arrays), respectively, were studied in a site located in north of Iran and besides the Caspian Sea called Kalarabad. Data acquisition in these arrays was carried out using three-component seismographs with minimum and maximum distance of 5 meters and 70 meters, respectively, for at least 18 continuous hours. In the mentioned site, dominant layering was saturated and poorly graded sandstone and shear wave velocity profile was formerly determined for a depth up to 50 meters by Down Hole method. Natural and dominant frequency of the site was obtained as much as 0.33 by H/V analyses. The dispersion curves obtained through processing each of subarrays were extracted and then compared with the dispersion curve obtained through shear wave velocity profile of Down Hole. This comparison indicated better efficiency of orthogonal arrays in the mentioned site. Also, azimuth direction of wave propagation was assessed in this site and the corresponding effects on subsurface structure identifiable ranges were studied in triangular and orthogonal arrays along with theoretical response for each form.
Arrays, Dispersion Curve, F-K Method, Microtremor, Shear Wave Velocity Profile
- Chouet B, De Luca G, Milana G, Dawson P, Martini M, Scarpa R. Shallow velocity structure of Stromboli Volcano, Italy, derived from small aperture array measurements of Strombolian tremor. Bull Seism Soc Am. 1998; 88:653–66.
- Suetomi I, Nakamura S. Spectral characteristics and nonlinear effects during recent large earthquakes observed at Kushiro City, Japan. Acapulco, Mexico: 10th World Conference on Earthquake Engineering. Amsterdam: ElseiverScience, CDROM; 1996.
- Blind comparisons of shear-wave velocities at closely spaced sites in San Jose, California: U.S. In: Asten MW, Boore editors. Geological survey open-file report 2005-1169; 2005.Available from: http://pubs.usgs.gov/of/2005/1169/
- Okada H. The microseismic survey method: Society of exploration geophysicists of Japan. Translated by Koya Suto, Geophysical Monograph Series. Tulsa: Society of Exploration Geophysicists; 2003.
- Haghshenas E, Bard PY, Theodulidis N. Empirical evaluation of microtremor H/V spectral ratio. SESAME WP04 TEAM. Bull Earthquake Eng. 2008; 6:75–108.
- Horike M. Inversion of phase velocity of long-period microtremors to the S-wave-velocity structure down to the basement in urbanized areas. J Phys Earth. 1985; 33:59–96.
- Asten MW, Henstridge JD. Array estimators and the use of microseisms for reconnaissance of sedimentary basins.Geophysics. 1984; 49:1828–37.
- Okada H. A research on long period microtremor array observations and their time and spatial characteristics as probabilistic process, report of a Grant-in-Aid for Co-operative Research. Supported by the Scientific Research Fund in 1985; 1986.
- Okada H. A research on the practical application of microtremor exploration technique to a wide area survey of a underground structure under 3,000 m in depth, report of a Grant-in-Aid for Co-operative Research. Supported by the Scientific Research Fund in 1993; 1994.
- Okada H, Matsushima K, Hidaka E. Comparison of spatial autocorrelation method and frequency-wavenumber spectral method of estimating the phase velocity of Rayleigh waves in long-period microtremors. Geophys Bull HokkaidoUniv. 1987; 49:53–62.
- Matsusima T, Okada H. A few remarks on the scheme of observation and analysis in estimating deep geological structures by using long-period microtremors. Geophys Bull Hokkaido Univ. 1989; 52:1–10.
- Sato T, Kawase H, Matsui M, Kataoka S. Array measurement of high frequency microtremors for underground structure estimation. Proc of the 4th International Conference on Seismic Zonation; 1991.
- Tokimatsu K, Shinzawa K, Kuwayama S, Abe A. Estimation of vs. profiles from Rayleigh wave dispersion data at site affected in the Loma Prieta Earthquake. Stanford, California: Proc of the 4th International Conference on Seismic Zonation. Earthquake Engineering Research Institute. 1991 Aug 25-29; 2:507–14.
- Tokimatsu K, Miyadera Y, Kuwayama S. Determination of shear wave velocity structures from spectrum analyses of short-period microtremors. Balkema, Rotterdam, Madrid, Spain: Proc 10th World Conference on Earthquake Engineering.1992 July 19-24; 1:253–8.
- Tokimatsu K, Shinzawa K, Kuwayama S. Use of short period microtremors for Vs profiling. J Geotech Eng. ASCE. 1992;118:1544–58.
- Yamanaka H, Takemura M, Ishida H, Ikeura T, Nozawa T, Sasaki T, Niwa M. Array measurements of long-period microtremors and estimation of S-wave velocity structure in the western part of the Tokyo metropolitan area. J Seism Soc Jpn. 1994; 47:163–72.
- Miyakoshi K, Okada H. Estimation of the site response in the Kushiro City, Hokkaido, Japan. Using microtremors with seismometer arrays. Acapulco, Mexico: 10th World Conference on Earthquake Engineering. Amsterdam: Elseiver Science, CD-ROM; 1996.
- Miyakoshi K, Kagawa T, Kinoshita S. Estimation of geological structures under Kobe area using the array recordings of microtremors. In: Irikura K, Kudo K, Okada H, Sasatani T, editors. AA Balkema, Rotterdam: The effects of surface geology on seismic motion; 1998. p. 691–6.
- Kagawa T, Sawada S, Iwasaki Y, Nanjo A. S-wave velocity structure model of the Osaka sedimentary basin derived from microtremor array observations. Jisin. 1998; 51:31–40.
- Ishida H, Nozawa T, Niwa M. Estimation of deep surface structure based on phase velocities and spectral ratios of long-period microtremors. The effects of surface geologyon seismic motion; 1998.
- Milana G, Barba S, Del Pezzo E, Zambonelli E. Site response from ambient noise measurements: New perspective from an array study in Central Italy. Bull Seism Soc Am. 1996;86:320–8.
- Kataoka S, Kawase H. Estimation of underground structure at Higashinada Ward, Kobe using surface wave of microtremorand explosion record. Jisin. 1998; 51:99–112.
- Kawase H, Satoh T, Iwata T, Irikura K. SW-wave velocity structure in the San Fernando and Santa Monica areas. Theeffects of surface geology on seismic motion. In: Irikura K,Kudo K, Okada H, Sasatani T, editors. A. A. Balkema, Rotterdam;1998. p. 733–40.
- Liu H, Boore DM, Joyner WB, Oppenheimer DH, Warrick RE, Zhang W, Hamilton JC, Brown LT. Comparison of phase velocities from array measurements of Rayleigh waves associated with microtremor and results calculated from borehole shear-wave velocity profiles. Bull Seism Soc Am. 2000; 90:666–78.
- Satoh T, Kawase H, Iwata T, Higashi S, Sato T, Irikura K, Huang H. S-wave velocity structure of the Taichung basin, Taiwan, estimated from array and single-station records of microtremors. Bull Seism Soc Am. 2001; 91:1267–82.
- Kudo K, Kanno T, Okada H, Ozel O, Erdik M, Sasatani T, Higashi S, Takahashi M, Yoshida K. Site-specific issues on strong ground motions during the Kocaeli, Turkey,earthquake of 17 August 1999. Bull Seism Soc Am. 2002;92:448–65.
- Ohori M, Nobata A, Wakamatsu K. A comparison of ESAC and FK methods of estimating phase velocity using arbitrarily shaped microtremor arrays. Bull Seism Soc Am.2002; 92:2323–32.
- Wathelet M. Array recordings of ambient vibrations: Surface-wave inversion [PhD thesis]. Belgium: University of Lige; 2005.
- Davoodi M, Haghshenas E. Evaluating the Reliability of f-k and SPAC methods. Beijing, China: The 14th World Conference on Earthquake Engineering; 2008 Oct 12-17.
- Zor E, Ozalaybey S, Karaaslan A, Cengiz T, Ozalaybey C, Tarancioglu A, Erkan B. Shear wave velocity structure of the ?zmit Bay area (Turkey) estimated from active–passive array surface wave and single?station microtremor methods.Geophysical Journal International. 2010; 182(3):1603–18.
- Esfahanizadeh M, Davoodi M, Haghshenas E, Jafari MK. Capability of F-K and SPAC methods in determining shear wave velocity of subsurface soil. Journal of Geotechnical Geology. 2014; 9(4):305–13.
- Wathelet M, Jongmans D, Ohrnberger M. Surface wave inversion using a direct search algorithm and its application to ambient vibration measurements. Near Surf Geophys. 2004; 2:211–21.
- Fah D, Kind F, Giardini D. A theoretical investigation of average H/V ratios. Geophys J Int. 2001; 145:535–49.
- Wathelet M, Ohrnberger M, Cornou C. Sesarray package contents; 2005. Available from: http://www.geophsy.org
- There are currently no refbacks.
This work is licensed under a Creative Commons Attribution 3.0 License.