GNGTS 2024 - Atti del 42° Convegno Nazionale

Session 1.1 GNGTS 2024 SUPERSTUDIES: an approach for integratng macroseismic datasets of diferent nature A. Tertulliani 1 , A. Antonucci 2 , F. Bernardini 3 , V. Castelli 3 , E. Ercolani 3 , L. Graziani 1 , A. Maramai 1 , M. Orlando 1 , A. Rossi 1 , T. Tuvè 4 I Isttuto Nazionale di Geofsica e Vulcanologia, Roma, Italy 2 Isttuto Nazionale di Geofsica e Vulcanologia, Milano, Italy 3 Isttuto Nazionale di Geofsica e Vulcanologia, Bologna, Italy 4 Isttuto Nazionale di Geofsica e Vulcanologia, Osservatorio Etneo, Catania, Italy In recent decades, a huge amount of informaton on Italian seismic history has been produced, contributng to the compilaton of the current seismic catalogues, CPTI15 (Rovida et al., 2020 and 2022) and CFTI5Med Guidoboni et al. 2018.). The last version of CPTI15 counts almost 5000 events from 1000 A.D. to 2020. CPTI15 is fed by DBMI15 (Locat et al., 2022), a macroseismic database that derives its data from approximately 190 studies on single events, produced over tme by the scientfc community. DBMI15 contains over 120,000 Macroseismic Data Points (MDPs) related to more than 3200 earthquakes. The epicentral parameters and MDPs list of each event in the CPTI-DBMI catalogue are based on a single reference study (the “preferred” one), selected by a criterion based on the quality of the study itself and on the number and distributon of the intensity data it provides. However, in many cases, multple studies are available in literature for the same event. For this reason, since 2017, the Italian Archive of Historical Earthquake Data (ASMI) has been published and it is contnuously implemented (Rovida et al., 2017), collectng many references of interest for the thousands of earthquakes included in the catalogue. At present, ASMI stores about 450 studies dedicated to more than 6000 earthquakes. For many of these earthquakes, multple studies, by diferent authors and of various kinds and complexity, are available, ensuring a multplicity of views and types of informaton. A screening of the available studies for diferent earthquakes showed that the "preferred" studies are not always those with the largest number of MDPs, or the most recent and up to date. In other words, there are cases in which the same earthquake has been investgated by diferent authors, who produced datasets that can difer in terms of MDPs, geographic coverage, and reference sources. This means that many available and published MDPs, are not included in the catalogue simply because they are not included in the “preferred” studies, and therefore, they cannot be used for any purpose. Earthquakes with multple studies are partcularly numerous in the period from 1985 to the present. A detailed analysis showed that these datasets could be, in many cases, complementary to each other. In the light of this, we aimed at integratng the diferent existng datasets for a given event in a unique intensity compilaton, thus optmising all the available intensity data. This possible data merging could give, for each studied earthquake, a signifcant increase both in MDPs number and