Cavola experiment site: geophysical investigation and deployment of a dense seismic array on a landslide

Bordoni, P. and Haines, A. J. and Di Giulio, G. and Augliera, P. and Cercato, M. and Martelli, L. and Cara, F. (2007) Cavola experiment site: geophysical investigation and deployment of a dense seismic array on a landslide. Annals of Geophysics, 50 (5). pp. 627-649.

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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 m×56 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.

Item Type: Article
Uncontrolled Keywords: 08AREP; IA57
Subjects: 02 - Geodynamics, Geophysics and Tectonics
Divisions: 02 - Geodynamics, Geophysics and Tectonics
Journal or Publication Title: Annals of Geophysics
Volume: 50
Page Range: pp. 627-649
Depositing User: Sarah Humbert
Date Deposited: 12 May 2009 16:48
Last Modified: 23 Jul 2013 09:54
URI: http://eprints.esc.cam.ac.uk/id/eprint/932

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