A comprehensive integrated macroseismic dataset from multiple earthquake studies

Abstract. Each Italian earthquake included in the Italian Parametric Catalogue (CPTI) is based on a single study, with its database stored in the Italian Macroseismic Database (DBMI). DBMI collects macroseismic intensity data from approximately 5,000 Italian earthquakes. However, for the same events, numerous studies have been independently carried out over the years in the literature whose data have not been incorporated into the DBMI. By consolidating all available data for each event, it is possible to significantly enhance the dataset used for hazard assessments and the reconstruction of local seismic histories. This approach would make studies of individual events much more robust and comprehensive. The objective of this work is to propose the integration of different macroseismic datasets for individual events by identifying criteria that can effectively merge a large number of intensity data points.

A total of 45 Italian earthquakes with data from multiple sources were identified and reassessed through a rapid review process. This effort has resulted in the creation of a new dataset, substantially increasing the number of Macroseismic Data Points (MDP) for the earthquakes covered by this study compared to those in DBMI15 (from 2,892 to 9,328 MDPs). Consequently, the macroseismic distributions for these 45 events have become more detailed, robust, and extensive.