title: Generalized optical theorem for surface waves and layered media.
abstract: We present a generalized optical theorem for surface waves. The theorem also applies to body waves since under many circumstances body waves can be written in terms of surface-wave modal summations. This theorem therefore extends the domain of applicability of the optical theorem from homogeneous background media to a general class of body and surface-wave propagation regimes within layered elastic media.
authors.affiliation: School of GeoSciences, Grant Institute, University of Edinburgh, Kings Buildings, West Mains Road, Edinburgh EH93JW, United Kingdom.
authors.forename: David
authors.initials: D
authors.lastname: Halliday
authors.forename: Andrew
authors.initials: A
authors.lastname: Curtis