Empirical evaluation of site effects by means of hiv spectral ratios at the locations of strong motion accelerometers in israel

Y. Zaslavsky, A. Shapira, J. Leonov

Research output: Contribution to journalArticlepeer-review


Acceleration data from local and regional earthquakes is of prime importance in evaluating the seismic hazard. Consequently, strong motion accelerometers are currently installed at more than 60 locations in Israel. We have explored the possibility of site amplification effects at 10 sites where local earthquakes triggered strong motion accelerometers by integrating empirical and analytical estimations. Implementing H/V spectral ratio techniques using 15 accelerograms from nine earthquakes, 105 seismograms shear-wave records of 35 local and regional earthquakes and seismograms of microtremors were used in the empirical evaluations. The subsurface models were constructed by integrating available geological and geophysical information at the analysed site with empirically evaluated site response functions. Amplification effects of factor 3-6 are observed at various frequencies in the 0.8-6.0 Hz band. Through the analysis process it became evident that the instant availability of many useful time windows of microtremors provides systematic estimations of the fundamental resonance frequency of each site and their associated amplification levels, which are similar to those obtained from HIV spectral ratios of seismogram3 and accelerograms and to those inferred from the subsurface geology. Analytical transfer functions should be reviewed with respect to empirical site response evaluations. Estimations that are based on only one approach may be totally misleading.

Original languageEnglish
Pages (from-to)655-677
Number of pages23
JournalJournal of Earthquake Engineering
Issue number4
StatePublished - 2003
Externally publishedYes


  • Acceleration
  • Ambient noise
  • Israel
  • Site effects
  • Strong ground motion

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology


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