Amplication effects from earthquakes and ambient noise in the Dead Sea rift (Israel)

Y. Zaslavsky, A. Shapira, A. A. Arzi

Research output: Contribution to journalArticlepeer-review


Seven sites were instrumented in the Parsa area located in the seismically active Dead Sea rift system. Moderate and weak motions generated by earthquakes and ambient noise were used to identify amplifications due to geological and topographic effects. Three observation methods were applied to estimate site effects: (1) conventional soil-bedrock station-pair spectral ratios for earthquake motions and microtremors; (2) horizontal-to-vertical component spectral ratios for shear-waves observed simultaneously at a site (receiver function estimates) and (3) horizontal-to-vertical spectral ratios of microtremor measurements (Nakamura estimate). The site response spectra of soil sites exhibited significant peaks between 1 and 3 Hz with amplification factors typically within the range of 2.5-4.0. A bedrock site on the high plateau near the escarpment top showed a peak between 2 and 3 Hz, mainly due to an EW oscillation of the NS topographic feature. Our observations indicated that seismograms recorded in the tunnel were either enriched or depleted at certain frequencies owing to interference of incident and surface-reflected waves.

Original languageEnglish
Pages (from-to)187-207
Number of pages21
JournalSoil Dynamics and Earthquake Engineering
Issue number1-4
StatePublished - 2000
Externally publishedYes


  • Amplification
  • Interferences
  • Sediment
  • Spectral ratio
  • Topographic feature

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Geotechnical Engineering and Engineering Geology
  • Soil Science


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