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earthquakes which occurred during the past one hundred years. These earthquakes were generated by three
dislinct seismogenic sources falling within the present extent of Rome. The comparison with the effect produced
in Rome by a large Apennine earthquake (January 13. 1915) suggests that the damage patterns are similar
and that they are mainly controlled by the local geology and morphology. The analysis shows that most of
the damage was concentrated in buildings located on alluvial deposits of the Tiber River rather than in buildings
underlain by different lithologies. In addition, the largest concentration of heavy darnage occurred in
buildings located on the alluvial deposits of the right-hand side of the Tiber River valley, and particularly
where the buried interface between Holocene and Pliocene deposits is steepest. This close relationship between
damage pattern on the one hand, and geology and geometry of the shallowest deposits on the other
hand, supports the results of ground motion modeling studies of the same area and similar observations collected
in different regions of the world during large earthquakes.
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