Materiali per un catalogo dei terremoti italiani: revisione di alcuni terremoti presenti nei bollettini macrosismici del XX secolo

Abstract

In the framework of the studies aimed at improving the knowledge of the seismicity of the Italian territory, starting from CPTI15, an analysis of the earthquakes that were scarcely documented and that needed a deeper knowledge has been undertaken. In particular, the analysis focused on those earthquakes whose only reference study was the Italian Macroseismic Bulletin (BMING/BMINGV). Of these, about forty events were identified and are the subject of this work. For each earthquake, the original macroseismic questionnaires, held in the INGV Macroseismic Archive, were retrieved and an accurate research of new accounts in the newspapers was carried out.
Data from 38 low-to-medium magnitude earthquakes occurring between 1980 and 2002, were reviewed: in total, about 2000 macroseismic questionnaires referring to more than 1400 localities have been examined. About 400 new localities have been identified for which information on 30 events was available, for a total of more than 450 new macroseismic observations.
Based on this new data set, intensities were assigned in EMS-98 and macroseismic parameters were calculated. For each earthquake a summary record was compiled with the new data and a map of the geographic distribution of the observations.