Guided waves in near-surface seismic surveys

Details

Serval ID
serval:BIB_405D8F83EB0A
Type
Article: article from journal or magazin.
Collection
Publications
Title
Guided waves in near-surface seismic surveys
Journal
Geophysical Research Letters
Author(s)
Roth M., Holliger K., Green A.
ISSN-L
0094-8276
Publication state
Published
Issued date
1998
Peer-reviewed
Oui
Volume
25
Pages
1071-1074
Language
english
Abstract
Much of the Earth's surface is covered by a thin blanket of unconsolidated
sediments or weathered bedrock. Boundaries within or at the base
of this surficial layer (e.g. watertable, bedrock surface, transition
to unweathered rock) are commonly associated with a strong seismic
contrast. Layers contained between the surface and shallowest boundaries
may be efficient waveguides and, as such, associated with significant
source-generated seismic noise. Whereas Rayleigh waves (groundroll)
can be described in terms of normal modes, we demonstrate that the
faster shingled guided waves can be explained in terms of leaking
modes. Due to the relatively high Poisson's ratios in the shallow
subsurface, guided waves are composed dominantly of multiply reflected
P-waves. We compare our results with those obtained using a conventional
acoustic waveguide approximation and discuss methods for extracting
information from guided waves for geotechnical and environmental
applications.
Open Access
Yes
Create date
25/11/2013 19:28
Last modification date
08/05/2019 17:36
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