Il terremoto di Rosciolo dei Marsi del 24 febbraio 1904 (Abruzzo, Italia centrale): revisione dei dati e nuove acquisizioni storiche

Abstract

The earthquake occurred in the NW sector of the Marsica region (Abruzzi Apennines, central Italy) on 24 February 1904 has been parametrized in the modern Italian seismic catalogues with magnitude Me 5.6 (CFTI5Med [B1: Guidoboni et al., 2018]) and Mw 5.68 (CPTI15 [B1: Rovida et al., 2022]).
This event damaged a region which, differently from the adjacent L’Aquila sector of the Apennines, was not characterized by a significant seismic history. The scientific and popular view of a territory seismically negligible was still further contradicted eleven years later, on 13 January 1915, when the
same area was struck by a catastrophic event (Mw 7.08 [B1: Rovida et al., 2022]), responsible for new damage (in some cases complete destruction) of the settlements already damaged in (and repaired after) 1904. Later on, the geological investigations since the 1970s showed that the above mentioned
earthquakes had occurred in a sector of the Apennines affected by recent and current fault activity [B1: Bosi, 1975; Bertini e Bosi, 1976; Giraudi, 1986; 1988; Serva et al., 1986; Galadini e Messina, 1994; Michetti et al., 1996; Galadini e Galli, 1999; Cavinato et al., 2002; Galli et al., 2012; Gori et al., 2017a; Patruno e Scisciani, 2021]. Some of the cited works deal with the 30‐Km‐long fault emerging along the western and northern borders of the Fucino basin, considered as the causative
source of the 1915 earthquake (Figure 1). In short, the modern geological and geomorphological knowledge indicates that the occurrence of strong seismic events would not be unexpected in this part of the central Apennines.
The characteristics of the 1904 earthquake summarized in the above‐mentioned parametric catalogues are based on a study published in the 1990s (i.e., the catalogue CFTI1 [B1: Boschi et al., 1995]), giving a distribution of the intensities according to the MCS macroseismic scale. Intensity data from that analysis indicate that the mainshock caused significant damage to several villages (Rosciolo dei Marsi, I 9 MCS; Magliano de’ Marsi, I 8‐9 MCS; Cappelle, Gallo, Poggio...