In the most recent international and national research projects on seismic hazard assessment, seismic sources are defined both as areas and as faults. The two models are then combined in a logic tree.
Whereas for area sources a large knowhow is available and many applications were done in Italy and worldwide, the use of fault sources for seismic hazard is still at the test stage. Furthermore, some applications seem to evidence strong differences with respect to results obtained with area sources.
During the course, different approaches to the geometric definition and seismic characterization of fault sources will be analysed and adopted; the resulting seismic hazard maps will be compared in order to better understand the main sources of uncertainty. The results will be also compared with those derived by the more traditional source zones model.