GNGTS 2017 - 36° Convegno Nazionale

224 GNGTS 2017 S essione 2.1 space. A heterogeneous slip distribution is obtained by summing up linearly the contributions by several homogeneous-slip faults (Fig. 2). The main result of our study is that the 2D GDs, with the exception of few events, give the least misfit field. Therefore, on average they appear to provide a more adequate representation of the on-fault SRCMOD slip heterogeneity with respect to the purely homogeneous and the analytical SSC models. We discuss some cases, illustrating both advantages and present limitations of the approach. References Freund L. B. and Barnett D. M.; 1976: A two-dimensional analysis of surface deformation due to dip-slip faulting . Bull. Seismol. Soc. Am., 66 , 667–675. Geist E. L. and Dmowska R.; 1999: Local tsunamis and distributed slip at the source . Pure Appl. Geophys., 154 , 485-512. Geist E., Titov V. V., Arcas D., Pollitz F. F. and Bilek S.L.; 2007: Implications of the 26 December 2004 Sumatra– Andaman earthquake on tsunami forecast and assessment models for great subduction-zone earthquakes . Bull. Seism. Soc. Am., 97(1A) , S249–S270, doi:10.1785/0120050619. Goda K., Mai P. M., Yasuda T. and Mori N.; 2014: Sensitivity of tsunami wave profiles and inundation simulations to earthquake slip and fault geometry for the 2011 Tohoku earthquake . Earth, Planets and Space, 66(1) , 105. Gusman A. R., Tanioka Y., Kobayashi T., Latief H. and Pandoe W.; 2010: Slip distribution of the 2007 Bengkulu earthquake inferred from tsunami waveforms and InSAR data . J. Geophys. Res., 115, B12316 , doi:10.1029/ 2010JB007565. Gutscher M. A., Roger J., Baptista M. A., Miranda J. M. and Tinti S.; 2006: Source of the 1693 Catania earthquake and tsunami (southern Italy): New evidence from tsunami modeling of a locked subduction fault plane . Geophys. Res. Lett., 33 , L08309, doi:10.1029/2005GL025442 Fig. 2 - Fields of the vertical Earth’s surface displacement corresponding to the four selected sources (see Fig. 1).