GNGTS 2021 - Atti del 39° Convegno Nazionale

GNGTS 2021 S essione 1.1 24 future development, we aim to parameterize directivity as a function of magnitude and source parameters, and thus be explicitly implemented in ground motion modelling and scenario predictions. ACKNOWLEDGEMENTS We are very grateful to Prof. Daniele Spallarossa (University of Genova) for making available the dataset used in this work. This research is supported by the Italian Ministry of University and Research (MIUR) in the frame of the project “Pianeta Dinamico” (Working Earth). References Abercrombie, R. E., Poli, P. And Bannister, S.; 2017. Earthquake directivity, orientation, and stress drop within the subducting plate at the Hikurangi margin, New Zealand. J. Geophys. Res. Solid Earth, 122 (10) , 176-188, DOI 10.1002/2017JB014935. Bates, D., Mächler, B., Bolker, B. and Walker, S.; 2015. Fitting linear mixed-effects models using lme4. J. Stat. Software, 67(1) , 1-48, DOI: 10.18637/jss.v067.i01. Boatwright, J.; 2007. The persistence of directivity in small earthquakes. Bull. Seismol. Soc. Am., 97 , 1850- 1861, DOI 10.1785/0120050228. Chen, P., Jordan, T. H., and Zhao, L.; 2010. Resolving fault plane ambiguity for small earthquakes. Geophys. J. Int., 181 , 493-501, DOI: 10.1111/j.1365-246X.2010.04515.x. Convertito, V., Pino, N. A. and Di Luccio, F.; 2016. Investigating source directivity of moderate earthquakes by multiple approach: the 2013 Matese (southern Italy) Mw=5 event. Geophys. J. Int., 207 , 1513-1528, DOI 10.1093/gji/ggw360. Haskell, N.; 1964. Total energy and energy spectral density of elastic wave radiation from propagating faults. Bull. Seism. Soc. Am., 54 (6A) , 1811-1841. Herrero, A. and Bernard, P.; 1994. A kinematic self-similar rupture process for earthquakes. Bull. Seism. Soc. Am., 84(4) , 1216-1228. Lanzano, G., Felicetta, C., Pacor, F., Spallarossa, D. and Traversa, P., 2020. Methodology to identify the reference rock sites in regions of medium-to-high seismicity: an application in Central Italy. Geophys. J. Int., 222(3) , 2052-2067, DOI 10.1093/gji/ggaa261. Marquardt, D.; 1963. An Algorithm for Least-Squares Estimation of Nonlinear Parameters. SIAM Journal on Applied Mathematics, 11(2) , 431-441. Pacor, F., Gallovič, F., Puglia, R., Luzi, L. and D’Amico, M.; 2016. Diminishing high-frequency directivity due to a source effects: empirical evidence from small earthquakes in the Abruzzo region, Italy. Geophys. Res. Lett., 43 , 5000-5008, DOI 10.1002/2016GL068546. Sgobba, S., Lanzano, G. and Pacor, F.; 2021. Empirical nonergodic shaking scenarios based on spatial correlation models: An application to central Italy. Earthq. Eng Struct. D., 50(1) , 60-80, DOI 10.1002/ eqq.3362. Sommerville, P., Smith, N. F., Graves, W. And Abrahamson, N.; 1997. Modification of empirical strong ground motion attenuation relations to include the amplitude and duration effects of rupture directivity. Seismol. Res. Lett., 68 , 199-222, DOI: 10.1785/gssrls.68.1.199. Tinti, E., Scognamiglio, L., Michelini, A. and Cocco, M.; 2016. Slip heterogeneity and directivity of the M L 6.0 Amatrice earthquake estimated with rapid finite-fault inversion. Geophys. Res. Lett., 43 , 10745-10752, DOI: 10.1002/2016GL071263.