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Cavola experiment site: Geophysical investigations and deployment of a dense seismic array on a landslide

Research output: Contribution to journalArticle

  • Paola Bordoni
  • John Haines
  • Giuseppe Di Giulio
  • Giuliano Milana
  • Paolo Augliera
  • Michele Cercato
  • Luca Martelli
  • Fabrizio Cara
  • Anna Horlestonhttp://orcid.org/0000-0002-6748-6522
  • Marco Cattaneo
  • Giovanna Cultrera
  • Riccardo Azzara
  • Angela Chesi
  • Gianfranco Colasanti
  • Marco Colasanti
  • Luciano Giovani
  • Vincenzo Cardinale
  • Felice Minichiello
  • Antonio Memmolo
  • Franco Pirro
  • Simone Marzorati
  • Ezio D'Alema
  • Mariano Maistrello
  • Pino Capone
  • Sergio Del Mese
  • Elisabetta D'Anastasio
  • Arianna Pesci
  • Alessandro Amato
  • Antonio Rovelli
  • Rita Nicolini
  • Federica Manenti
  • Giancarlo Tagliatini
  • Lorenzo Del Maschio
  • Francesca Lugli
Original languageEnglish
Pages (from-to)627-649
Number of pages23
JournalAnnals of Geophysics
Volume50
Issue number5
DatePublished - 1 Oct 2007

Abstract

Geophysical site investigations have been performed in association with deployment of a dense array of 95 3-component seismometers on the Cavola landslide in the Northern Apennines. The aim of the array is to study propagation of seismic waves in the heterogeneous medium through comparison of observation and modelling. The small-aperture array (130 mx56 m) operated continuously for three months in 2004. Cavola landslide consists of a clay body sliding over mudstone-shale basement, and has a record of historical activity, including destruction of a small village in 1960. The site investigations include down-hole logging of P- and S-wave travel times at a new borehole drilled within the array, two seismic refraction lines with both P-wave profiling and surface-wave analyses, geo-electrical profiles and seismic noise measurements. From the different approaches a consistent picture of the depths and seismic velocities for the landslide has emerged. Their estimates agree with resonance frequencies of seismic noise, and also with the logged depths to basement of 25 m at a new borehole and of 44 m at a pre-existing borehole. Velocities for S waves increase with depth, from 230 m/s at the surface to 625 m/s in basement immediately below the landslide.

    Research areas

  • Borehole measurements, H/V noise spectral ratios, Landslide, Seismic array, Seismic refraction

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