GNGTS 2016 - Atti del 35° Convegno Nazionale

GNGTS 2016 S essione A matrice 15 for mapping surface faulting potential along tectonic structures in Italy, a basic complement to earthquake hazard reduction programmes […].” (Cello et al. , 1998). The Col orito surface ruptures, and now the Amatrice earthquake, de nitely prove that the so-called “nastri di faglia” (Segre, 1950) are themselves evidence of very recent strong paleoseismicity (in contrast to what was concluded by some authors; i.e., Bosi et al. , 1993; Fubelli et al. , 2009) and can be safely used for capable fault mapping and seismic source characterisation. The evidence discussed in this note also stresses that surface faulting should be regarded as a typical phenomenon for > IX (in the MM, MSK, MCS, and ESI 2007 scale; e.g., Serva et al. , 2016). Hydrochemical relationships with the earthquake. Changes in hydrogeochemistry before and after earthquakes have been linked to temporal changes of permeability structure, fluid flow, and/or fluid-rock interaction (Claesson et al. , 2004). In collaboration with University of Nevada at Reno, we sampled the Peschiera, Vicenna Riara and Santa Susanna springs near Rieti; the Uccelletto spring (SN sampling point, Nerea S.p.A. drinking water facility; Fig. 3) Fig. 2 – a) Coseismic rupture of the September 26, 1997, M6 Colfiorito earthquake on the Costa limestone fault scarp (Cello et al. , 1998); b) Vettore fault rupture in the August 24, 2016, earthquake; c) Coseismic rupture corresponding to the fault plane exposed in the road cut at La Pintura site, Colfiorito basin (Cello et al. , 1998); d) Coseismic rupture corresponding to the fault plane exposed in the road cut along the Vettore fault near Forca di Presta.