Estimation of S-wave Velocity Structure of OHNO Basin Based on Microtremor Observation

• KOJIMA Keisuke

  Department of Architecture and Civil Engineering, Graduate School of Engineering, University of Fukui

Bibliographic Information

Other Title

• 常時微動観測に基づく大野盆地のS波速度構造の推定

Abstract

 The microtremor array observations and the 3-components single site observations were conducted to clarify the S-wave velocity structure of the Ohno basin in Fukui Prefecture. The Rayleigh wave phase velocities at each array site were calculated by the spatial autocorrelation method. The phase velocities at each site were inverted to a 1D S-wave profile using a genetic inversion. The subsurface structures down to the Neogene were back analyzed based on the H/V spectra. The 3D S-wave velocity structure around the Ohno Basin was interpolated by using Kriging techniques. The validity of the estimated structure from the microtremor observation was confirmed by comparing with the density structure and with the existing boring logging data. The estimated S-wave velocity structure indicated that the newly developed urban area of Ohno city was located on the low velocity zone.

Journal

• Journal of the Japan Society of Engineering Geology

  Journal of the Japan Society of Engineering Geology 55 (1), 28-37, 2014

  Japan Society of Engineering Geology

Keywords

• Ohno basin
• microtremor
• <i>H</i>/<i>V</i> spectral ratio
• S-wave velocity

Details

• CRID: 1390282679072298368
• NII Article ID: 130004559059
• DOI: 10.5110/jjseg.55.28
• ISSN: 18840973
• ISSN: 02867737
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed