We present the results of a rapid and reliable study of 45 Italian earthquakes characterized by datasets with potential inconsistencies or inhomogeneities. The used methodology obviates the need for exhaustive earthquake re-evaluation, and it is particularly effective for the updating of medium and low events, with a large amount of low-intensity data. The result is a new dataset very useful in improving “seismic histories” and in contributing to the enhancement of the seismic hazard of an area.