Estimation of S-wave Velocity Structures by Using Microtremor Array Measurements for Subsurface Modeling in Jakarta

Mohamad Ridwan, A. Afnimar, Sri Widiyantoro, Masyhur Irsyam, Hiroaki Yamanaka


Jakarta  is located on  a  thick sedimentary  layer that  potentially has a very  high  seismic  wave  amplification.  However,  the  available information concerning the  subsurface model and bedrock depth  is insufficient  for a seismic hazard  analysis.  In  this  study,  a  microtremor  array  method  was  applied  to estimate the geometry and S-wave velocity of the sedimentary layer. The spatial autocorrelation  (SPAC)  method  was  applied  to  estimate  the  dispersion  curve, while  the S-wave  velocity  was  estimated  using  a  genetic  algorithm  approach. The  analysis  of  the  1D  and  2D  S-wave  velocity  profiles  shows  that  along  a north-south  line,  the  sedimentary  layer  is  thicker  towards  the  north.  It  has  a positive  correlation  with  a  geological  cross section  derived  from  a borehole down to  a depth of  about 300 m. The SPT data from  the  BMKG site  were used to  verify  the  1D  S-wave  velocity  profile.  They  show  a  good agreement. The microtremor analysis  reached  the engineering bedrock  in a  range from 359  to 608  m  as  depicted by a  cross section  in  the  north-south  direction. The site class was also estimated at each site, based on the average S-wave velocity until 30 m depth. The sites UI to ISTN belong to class  D (medium soil),  while BMKG and ANCL belong to class E (soft soil).

Full Text:



Padmosukismo, S. & Yahya, I., The Basement Configuration of the North West Java Area, IPA Proceedings of the 3rd Annual Convention, Jakarta, 1, pp. 129-152, 1974.

Turkandi, T., Sidarto, Agustiyanto, D.A. & Hadiwodjoyo, M.M.P., Geological Map of Jakarta and Kepulauan Seribu Quadrangles Jawa, Geological Research and Development Centre, Ministry of Energy and Mineral Resources, 1992.

Fachri, M., Djuhaeni, Hutasoit, L.M. & Ramdhan, A.M., Stratigraphy and Hydrostratigraphy of Ground Water Basin for Jakarta, Bulletin Geology, 34(3), pp. 169-189, 2002. (Text in Indonesian)

Aki, K., Space and Time Spectra of Stationary Stochastic Waves, with Special Reference to Microtremors, Bulletin of the Earthquake Research Institute, University of Tokyo, 35, pp. 415-456, 1957.

Okada, H., Microtremors as an Exploration Method, Geoexploration Handbook, 2, Society of the Exploration Geophysicists of Japan, 1998.

Okada, H., The Microtremors Survey Method, Geophysical Monograph Series, 12, 2003.

Morikawa, H., Sawada, S. & Akamatsu, J., A Method to Estimate Phase Velocities of Rayleigh Wave Using Microseisms Simultaneously Observed at Two Sites, Bulletin of the Seismological Society of America, 94(3), pp. 961-976, 2004.

Yamanaka, H. & Ishida, H., Application of Genetic Algorithms to an Inversion of Surface Wave Dispersion Data, Bulletin of the Seismological Society of America, 86(2), pp. 436-444, 1996.

SNI3-03-1726-2012, Guidelines of Earthquake Resistant Design for Building Structures, The National Standardization Agency of Indonesia,

(Text in Indonesian)

Irsyam, M., Sahadewa, A. & Darjanto, H., Soil Dynamics and Machine Foundation, Institut Teknologi Bandung, ISBN 978-979-1344-24-1,

(Text in Indonesian)

Imai, T. & Tonouchi, K., Correlation of N-value with S-Wave Velocity and Shear Modulus, Proceedings of the 2nd European Symposium on

Penetrating Testing, Amsterdam, Netherlands, pp. 67-72, 1982.

Imai, T., P- and S-Wave Velocities of the Ground in Japan, Proc. 9th, Int. Conf. Soil Mechanics and Foundation Eng., Tokyo, pp. 257-260, 1997.

Ohta, Y. & Goto, N., Empirical Shear Wave Velocity Equation in Terms of Characteristic Soil Indexes, Earthquake Engineering and Structural

Dynamics, 6, pp. 167-187, 1978.

Sykora, D.W. & Stokoe, K.H., Correlation of In Situ Measurement in Sands of Shear Wave Velocity, Soil Characteristics, and Site Conditions,

Geotechnical Engineering Report GR83-33, The University of Texas,Austin, 1983.

Yamanaka, H. & Yamada, N., Estimation of 3D S-wave Velocity Model of Kanto Basin, Japan, Using Rayleigh Wave Phase Velocity, Bulletin of the Earthquake Research Institute, University of Tokyo, 81, pp. 295-301, 2006.



  • There are currently no refbacks.

View my Stats

Creative Commons License
This work is licensed under a Creative Commons Attribution-NoDerivatives 4.0 International License.