• Startseite

• Institut

• Einleitung

• OnSITE - On-line seismic imaging for tunnel seismic exploration

• Finite-Difference Seismic Wave Simulation

• Time-Domain Full Waveform Tomography

• Seismic Prediction Ahead of Boreholes

Inversion of Surface Waves

In most near surface seismic investigations the acquired wavefield is dominated by surface waves.   It is a fundamental property of surface waves that high frequencies (shortes wavelength) are sensitive to the properties of the near-surface materials, while smaller frequencies probe the deeper subsurface.  This leads to the dispersive nature of surface waves, i.e. their propagation velocity depends upon frequency.  This dispersion  is generally exploitet to reconstruct the elastic properties of the subsurface.

The small penetration depth of approximately one wavelength only and the very high signal to noise ratio of surface waves (comapared to body waves) makes the analysis of surface wave attractive for shallow geotechnical investigations.

Work group

Thomas Bohlen
Denise De Nil
Stefan Jetschny
Nhi Xuan Ngyen
Olaf Hellwig

References

Anna Przebindowska, 2007, 1D joint inversion of Rayleigh and Love wave dispersion curves, seminar paper, Technical University Bergakademie Freiberg (pdf)

Bohlen, T., Lorang, U., Rabbel, W., Müller, C., Giese, R., Lüth, S., Jetschny, S., 2007, Rayleigh-to-shear wave conversion at the tunnel face - from 3D-FD modeling to ahead-of-drill exploration, Geophysics, in press.

Kugler, S., Bohlen, T., Forbriger, T., Bussat, S. and Klein, G., 2007, Scholte-wave tomography for shallow-water marine sediments, Geophysical Journal International, 168, 2, 551-570 (abstract)

Bohlen, T. and Saenger, E.H., 2006, Accuracy of heterogeneous staggered-grid finite-difference modeling of Rayleigh waves, Geophysics, Volume 71, No. 4, Pages T109-T115 (pdf)

Kugler, S., Bohlen, T., Bussat, S., Klein, G., 2005, Variability of Scholte wave dispersion in shallow-water marine sediments, Journal of Environmental and Engineering Geophysics (JEEG), special edition on surface waves, volume 10, issue 2, pp 203-218. (pdf)

Bohlen, T., Kugler, S., Klein, G., Theilen, F, 2004, 1.5-D Inversion of Lateral Variation of Scholte Wave Dispersion, Geophysics, 69, No. 2, 330-344, (pdf