GNGTS 2022 - Atti del 40° Convegno Nazionale

GNGTS 2022 Sessione 1.1 63 faults that experience a larger decrease in stress. We found a good agreement between the spatiotemporal evolution of CAFS earthquake sequence and the Coulomb static stress transfer between neighboring faults. Faults falling into the stress shadows were inhibited, avoiding their reactivation after a strong earthquake generated by the adjoining source fault, on the contrary, fault segments subjected to increased stress ruptured in shorter times than their characteristic return time. The efficiency of this novel approach to the analysis of the seismic cycle and the influence of Coulomb static stress transfer have been successfully tested on historical seismic activity, giving insights on its possible future applicability in estimating active fault rupture susceptibility, integrating additional multidisciplinary data from research branches studying other factors which influence fault activity (e.g. circulation of fluids, regional stress, GNSS data, etc.). Important implications of this new methodology are desirable in the context of the seismic hazard assessment for the implementation of advanced and integrated strategies on seismic risk reduction and disaster management. References Aki K. and Richards P.G.; 1980: Quantitative Seismology Theory and Methods (Vol. 1). W. H. Freeman and Company, San Francisco. Barnett J. A., Mortimer J., Rippon J. H., Walsh J. J. and Watterson J.; 1987: Displacement geometry in the volume containing a single normal fault. AAPG Bulletin, 71(8), 925-937. Cello G., Mazzoli S., Tondi E. and Turco E.; 1997: Active tectonics in the central Apennines and possible implications for seismic hazard analysis in peninsular Italy. Tectonophysics, 272(1), 43-68. Cello G., Tondi E., Micarelli L. and Mattioni L.; 2003: Active tectonics and earthquake sources in the epicentral area of the 1857 Basilicata earthquake (southern Italy). Journal of Geodynamics, 36(1-2), 37-50. Galderisi A. and Galli P.; 2020: Coulomb stress transfer between parallel faults. The case of Norcia and Mt Vettore normal faults (Italy, 2016 Mw 6.6 earthquake) . Results in Geophysical Sciences, 1, 100003. Galli P., Galderisi A., Messina P. and Peronace E.; 2022: The Gran Sasso fault system: Paleoseismological constraints on the catastrophic 1349 earthquake in Central Italy. Tectonophysics, 822, 229156. Gupta A. and Scholz C. H.; 2000: A model of normal fault interaction based on observations and theory. Journal of Structural Geology, 22(7), 865-879. Lin J. and Stein R. S.; 2004: Stress triggering in thrust and subduction earthquakes and stress interaction between the southern San Andreas and nearby thrust and strike ‐ slip faults. Journal of Geophysical Research: Solid Earth, 109(B2). Mele F., Castello B., Marcocci C., Moro R., MarchettiA. and Riposati D.; 2007: ISIDe, Italian Seismological Instrumental and parametric Data-basE. GNGTS 2007. Mildon Z. K., Toda S., Faure Walker J. P. and Roberts G. P.; 2016: Evaluating models of Coulomb stress transfer: Is variable fault geometry important?. Geophysical Research Letters, 43(24), 12-407. Rovida A., LocatiM., Camassi R., Lolli B., Gasperini P. and Antonucci A.; 2022: Italian Parametric Earthquake Catalogue CPTI15 , version 4.0. Toda S., Stein R. S., Richards‐Dinger K. and Bozkurt S. B.; 2005: Forecasting the evolution of seismicity in southern California: Animations built on earthquake stress transfer. Journal of Geophysical Research: Solid Earth, 110(B5). Tondi E.; 2000: Geological analysis and seismic hazard in the central Apennines (Italy). Journal of Geodynamics, 29(3-5), 517-533. Tondi E. and Cello G.; 2003: Spatiotemporal evolution of the Central Apennines fault system (Italy). Journal of Geodynamics, 36(1-2), 113-128. Tondi E., Jablonská D., Volatili T., Michele M., Mazzoli S. and Pierantoni P. P.; 2020: The Campotosto linkage fault zone between the 2009 and 2016 seismic sequences of central Italy: Implications for seismic hazard analysis. GSA Bulletin, 133(7-8), 1679-1694. Vannucci G., Lolli B. and Gasperini P.; 2021: Inhomogeneity of macroseismic intensities in Italy and consequences for macroseismic magnitude estimation. Seismological Society of America, 92(4), 2234-2244. Walsh J. J. and Watterson J.; 1987: Distributions of cumulative displacement and seismic slip on a single normal fault surface. Journal of Structural Geology, 9(8), 1039-1046.