%0 Journal Article %1 bohlen_etal:2004 %A Bohlen, Thomas %A Kugler, Simone %A Klein, Gerald %A Theilen, Friedrich %D 2004 %I SEG %J Geophysics %K geophysics seismics %N 2 %P 330--344 %R 10.1190/1.1707052 %T 1.5D inversion of lateral variation of Scholte-wave dispersion %U http://dx.doi.org/10.1190/1.1707052 %V 69 %X Reliable models of in-situ shear-wave velocities of shallow-water marine sediments are important for geotechnical applications, lithological sediment characterization, and seismic exploration studies. We infer the 2D shear-wave velocity structure of shallow-water marine sediments from the lateral variation of Scholte-wave dispersion. Scholte waves are recorded in a common receiver gather generated by an air gun towed behind a ship away from a single stationary ocean-bottom seismometer. An offset window moves along the common receiver gather to pick up a local wavefield. A slant stack produces a slowness-frequency spectrum of the local wavefield, which contains all modes excited by the air gun. Amplitude maxima (dispersion curves) in the local spectrum are picked and inverted for the shear-wave velocity depth profile located at the center of the window. As the window continuously moves along the common receiver gather, a 2D shear-wave velocity section is generated. In a synthetic example the smooth lateral variation of surficial shear-wave velocity is well reconstructed. The method is applied to two orthogonal common receiver gathers acquired in the Baltic Sea (northern Germany). The inverted 2D models show a strong vertical gradient of shear-wave velocity at the sea floor. Along one profile significant lateral variation near the sea floor is observed.

@article{bohlen_etal:2004, abstract = {Reliable models of in-situ shear-wave velocities of shallow-water marine sediments are important for geotechnical applications, lithological sediment characterization, and seismic exploration studies. We infer the 2D shear-wave velocity structure of shallow-water marine sediments from the lateral variation of Scholte-wave dispersion. Scholte waves are recorded in a common receiver gather generated by an air gun towed behind a ship away from a single stationary ocean-bottom seismometer. An offset window moves along the common receiver gather to pick up a local wavefield. A slant stack produces a slowness-frequency spectrum of the local wavefield, which contains all modes excited by the air gun. Amplitude maxima (dispersion curves) in the local spectrum are picked and inverted for the shear-wave velocity depth profile located at the center of the window. As the window continuously moves along the common receiver gather, a 2D shear-wave velocity section is generated. In a synthetic example the smooth lateral variation of surficial shear-wave velocity is well reconstructed. The method is applied to two orthogonal common receiver gathers acquired in the Baltic Sea (northern Germany). The inverted 2D models show a strong vertical gradient of shear-wave velocity at the sea floor. Along one profile significant lateral variation near the sea floor is observed.}, added-at = {2012-09-01T13:08:21.000+0200}, author = {Bohlen, Thomas and Kugler, Simone and Klein, Gerald and Theilen, Friedrich}, biburl = {https://www.bibsonomy.org/bibtex/2b75e52f57c20770d160b9f405e4995a8/nilsma}, day = 1, doi = {10.1190/1.1707052}, interhash = {326d4f4970d0861f80a947259a365406}, intrahash = {b75e52f57c20770d160b9f405e4995a8}, journal = {Geophysics}, keywords = {geophysics seismics}, month = mar, number = 2, pages = {330--344}, publisher = {SEG}, timestamp = {2021-02-09T13:26:58.000+0100}, title = {1.5D inversion of lateral variation of Scholte-wave dispersion}, url = {http://dx.doi.org/10.1190/1.1707052}, volume = 69, year = 2004 }