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P. Borejko:
"An analytical simulation of the seismic field in a sloping alluvial layer over a rock basement";
in: "13th World Conference on Earthquake Engineering Conference Proceedings", issued by: Society for Earthquake Engineering; 13th World Conference of Earthquake Engineering, Vancouver, 2004, (invited), ISBN: 0-9685376-1-8, Paper ID 2090, 12 pages.

An analytical simulation of the seismic field is presented for a wedge-shaped alluvial layer overlying a rock basement (a dipping structure). Time domain responses, illustrating essential features of seismic propagation in a three-dimensional (3-D) alluvial wedge, are evaluated at receivers located down-dip, cross-slope, and up-dip of a point source located within the wedge. This simulation of the field is adequate in that it accounts for seismic penetration of the bottom characteristic for a real rock, but it is intrinsically unable to include contributions from the S-phases of the field typically present in a real alluvial ground.

http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC04967217