title: Analyzing the coda from correlating scattered surface waves.
abstract: The accuracy of scattered Rayleigh waves estimated using an interferometric method is investigated. Summing the cross correlations of the wave fields measured all around the scatterers yields the Green's function between two excitation points. This accounts for the direct wave and the scattered field (coda). The correlations themselves provide insights into the location of the scatterers, as well as which scatterer is responsible for particular parts of the coda. Furthermore, these measurements confirm a constant-time arrival in the correlations, not part of the Green's function, but which has previously been derived as a result of the generalized optical theorem.
authors.affiliation: Physical Acoustics Laboratory, Department of Geosciences, Boise State University, Boise, Idaho 83725, USA. dmikesell@cgiss.boisestate.edu
authors.forename: T Dylan
authors.initials: TD
authors.lastname: Mikesell
authors.forename: Kasper
authors.initials: K
authors.lastname: van Wijk
authors.forename: Thomas E
authors.initials: TE
authors.lastname: Blum
authors.forename: Roel
authors.initials: R
authors.lastname: Snieder
authors.forename: Haruo
authors.initials: H
authors.lastname: Sato