GNGTS 2019 - Atti del 38° Convegno Nazionale

86 GNGTS 2019 S essione 1.1 Bibliografia Baratta M.; 1901: I terremoti d’Italia; saggio di storia geografia e bibliografia sismica italiana , pp. 950. Torino. Blumetti A.M.; 1995: Neotectonic investigation and evidence of paleoseismicity in the epicentral area of the January– February 1703, central Italy, earthquakes . In: Serva, L., Slemmons, B. (Eds.), Perspectives in Paleoseismology. Special Publication-Association of Engineering Geologists, vol. 6. pp. 83–100. Calamita F., Coltorti M., Deiana G., Dramis F., Pambianchi G.; 1982: Neotectonic evolution and geomorphology of the Cascia and Norcia depression (Umbria–Marche Apennine) . Geogr. Fis. Din. Quat. 5, 263–276. De Carolis P.; 1703: Relazione generale delle ruine, e mortalità cagionate dalle scosse del Terremoto de’14. Gennaro e 2. Febbraro 1703 in Norcia, e Cascia, e loro contadi (omissis). In: Chracas, L.A., (Roma. 27 pp.) Galadini F., Galli P., Leschiutta I., Monachesi G., Stucchi M.; 1999: Active tectonics and seismicity in the area of the 1997 earthquake sequence in Central Italy: A short review . Journal of Seismology, 2, 1–9. Galadini F., Galli P.; 2000: Active tectonics in the central Apennines (Italy)—Input data for seismic hazard assessment . Natural Hazards, 22, 202–223. Galli P., Galadini F.; 1999: Seismotectonic framework of the 1997-98 Umbria-Marche (Central Italy) earthquakes. Seismological Research Letters, 70, 404–414. Galli P., Galadini F., Calzoni F.; 2005: Surface faulting in Norcia (central Italy): A “paleoseismological perspective” . Tectonophysics, 403, 117–130. Galli P., Castenetto S., Peronace E.; 2017: The macroseismic intensity distribution of the 30 October 2016 earthquake in Central Italy (Mw 6.6): Seismotectonic implications . Tectonics 36, 1–13. https://doi.org/10.1002/2017tc00458. Galli P., Galderisi A., Ilardo I., Piscitelli S., Scionti V., Bellanova J., Calzoni F.; 2018: Holocene paleoseismology of the Norcia fault system (central Italy). Tectonophysics, 745, 154–169. https://doi.org/10.1016/j.tecto.2018.08.008. Gasperini P., Vannucci G., Tripone D., Boschi E.; 2010: The location and sizing of historical earthquakes using the attenuation of macroseismic intensity with distance . Bull. Seismol. Soc. Am. 100, 2035–2066. https://doi. org/10.1785/0120090330. Gentili B., Pambianchi G.; 1999: Contributo alla ricostruzione dell’evoluzione geomorfologica del versante adriatico dell’Appennino umbro-marchigiano (Italia centrale). In: Orombelli G. Studi geografici e geologici in onore di Severino Belloni, Glauco Briganti Genova, 391-403. ACROSS-STRIKE VARIATIONS OF FAULT SLIP-RATES CONSTRAINED USING IN-SITU COSMOGENIC 36 CL CONCENTRATIONS F. Iezzi 1 , G. Roberts 1 , J. Faure Walker 2 , I. Papanikolaou 3 , A. Ganas 4 1 Department of Earth and Planetary Sciences, Birkbeck, University of London, London, UK 2 Institute for Risk and Disaster Reduction, University College London, London, UK 3 Mineralogy-Geology Laboratory, Department of Natural Resources Development and Agricultural Engineering, Agricultural University of Athens, Greece 4 National Observatory of Athens, Institute of Geodynamics, Athens, Greece The identification of slip-rates on active faults is vital in order to quantify earthquake recurrence intervals for probabilistic seismic hazard analysis. It has been already shown that the interaction between adjacent faults within dense fault systems influences the slip-rate of single faults (e.g. Cowie and Roberts, 2001; Bennett et al. , 2004; Roberts and Michetti, 2004). To better understand the dynamics of normal fault systems, it is important to improve the knowledge on the relationships between faults distributed across the strike of a fault system. Recent findings suggest that adjacent faults arranged across the strike of a narrow fault system in Central Italy, with faults spaced ~5 km across strike or less, works together to accommodate the regional deformation (Iezzi et al. , 2019). However, less is known about the interaction between more distant across-strike faults. Cowie et al. (2013; 2017) suggested that parallel sets of faults interact through time, with activity switching back and forth across-strike yet maintaining the regional strain-rate. This is supported by observation of post 1349AD historical seismicity localized on specific sets of faults on the NE flank of the Apennines, yet earlier Holocene strains, constrained by observations of