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TitleUpdate on recent observations in multi-component seismic reflection profiling
AuthorPugin, A J -M; Pullan, S E; Hunter, J A
SourceProceedings, SAGEEP'2010 (Symposium on the Application of Geophysics to Environmental and Engineering Problems); 2010 p. 607-614
Alt SeriesEarth Sciences Sector, Contribution Series 20090392
MeetingSAGEEP'2010; Keystone, CO; US; April 11-15, 2010
Subjectsgeophysics; seismic surveys; seismic profiles; seismic reflection surveys; seismic waves; wave propagation
ProgramAquifer Assessment & support to mapping, Groundwater Geoscience
AbstractExamples of multi-component shallow seismic reflection profiling from different environments in eastern Canada are presented to examine the benefits of shear wave reflection data and the latest developments in acquisition methodology, as well as our evolving understanding of the complex nature of seismic wave propagation. Examination of the wave motion through multi-component recording shows that, regardless of the source orientation, shear wave reflections may be polarized in varying directions. In "soft" soils characterized by low shear wave velocities, extremely high-resolution shear wave reflection sections can be obtained, with the highest-resolution data related to in-line or vertical components of motion. Data recorded in the transverse (SH) direction are generally somewhat lower in frequency but may be better able to penetrate into more compact (higher velocity) sediments. Multicomponent recording provides the capacity to record all data, without having to know the main shear wave polarization direction prior to data acquisition.