Hazard-oriented multiscale seismicity model: Italy
A novel hierarchical approach is put forward to handle the frequency-magnitude (FM) relation in seismic risk problems. The approach relies on the hypothesis that only events that are geometrically small in comparison with the elements of the seismotectonic regionalization can be described by a log-linear FM relation. That the FM relation is not universally applicable is corroborated by an analysis of worldwide seismicity using the Harvard catalog where the seismic moment is recorded for earthquake size. The idea of a hierarchical modeling for the FM relation is implemented for Italy.