Open AccessThe effect of underground structure on seismic motions of the ground surface
Author(s) -
Crichlow Joel M.
Publication year - 1982
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1982.tb05974.x
Subject(s) - seismogram , geology , ground motion , seismology , surface (topology) , position (finance) , anomaly (physics) , seismic wave , surface wave , geodesy , geophysics , geometry , physics , mathematics , optics , finance , condensed matter physics , economics
Summary. Two‐dimensional finite element modelling of underground structural anomalies at shallow depths has been done to obtain the response at the ground surface to damped, vertically incident, SH ‐waves. Power spectral ratios are examined to determine what effects the position, shape, depth and size of the anomaly have on the surface seismograms. Based on the results gathered from a number of models, inferences are made with respect to the inverse problem: given the seismic motion of the ground surface, what can be said about the underground structure?