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dc.description.abstractThe dip angle is one of the fault parameters that mostly affects seismic hazard analyses because it not only influences the inference of other fault parameters (e.g. down-dip width, earthquake maximum magnitude based on fault scaling laws) but also, and most importantly, controls the fault-to-site distance values of ground motion estimates. We present the results of a global survey of earthquake-fault dip angles (G-DIP) and analyze their empirical distribution for various faulting categories. These new empirical statistics are derived from an extended and homogeneous dataset, thereby improving previous fault dip-angle distributions. Subduction interface sources are considered separately from other thrust faults. In agreement with other studies, important deviations from the classical Anderson’s predictions are found for all faulting categories (Fig. 1). Our results can effectively be used as distribution priors for characterizing the geometry of poorly known seismogenic faults in seismic hazard analyses and earthquake-fault modeling experiments.en
dc.description.sponsorshipThis work was supported by the INGV projects “Abruzzo” (code: RBAP10ZC8K_003). MMT was supported by the INGV-DPC-CPS Agreement.en
dc.relation.ispartofPSHA workshopen
dc.subjectfault dipen
dc.titleEarthquake-fault dip angle statistics for PSHA analysesen
dc.typePoster sessionen
dc.subject.INGV04.04. Geologyen
dc.subject.INGV04.07. Tectonophysicsen
dc.description.ConferenceLocationLenzburg, Switzerlanden
dc.relation.referencesBasili, R., Kastelic, V., Demircioglu, M.B., Garcia Moreno, D., Nemser, E.S., Petricca, P., Sboras, S.P., Besana-Ostman, G.M., Cabral, J., Camelbeeck, T., Caputo, R., Danciu, L., Domac, H., Fonseca, J., García-Mayordomo, J., Giardini, D., Glavatovic, B., Gulen, L., Ince, Y., Pavlides, S., Sesetyan, K., Tarabusi, G., Tiberti, M.M., Utkucu, M., Valensise, G., Vanneste, K., Vilanova, S., Wössner, J., 2013. The European Database of Seismogenic Faults (EDSF) compiled in the framework of the Project SHARE., doi: 10.6092/INGV.IT-SHARE-EDSF. Bird, P., 2003. An updated digital model of plate boundaries. Geochemistry, Geophysics, Geosystems 4, n/a-n/a, doi: 10.1029/2001gc000252. Collettini, C., Sibson, R.H., 2001. Normal faults, normal friction? Geology 29, 927-930, doi: 10.1130/0091-7613(2001)029<0927:nfnf>;2. Dziewonski, A.M., Chou, T.A., Woodhouse, J.H., 1981. Determination of earthquake source parameters from waveform data for studies of global and regional seismicity. Journal of Geophysical Research 86, 2825, doi: 10.1029/JB086iB04p02825. Ekström, G., Nettles, M., Dziewoński, A.M., 2012. The global CMT project 2004–2010: Centroid-moment tensors for 13,017 earthquakes. Physics of the Earth and Planetary Interiors 200-201, 1-9, doi: 10.1016/j.pepi.2012.04.002. Helffrich, G.R., 1997. How good are routinely determined focal mechanisms? Empirical statistics based on a comparison of Harvard, USGS and ERI moment tensors. Geophysical Journal International 131, 741-750, doi: 10.1111/j.1365-246X.1997.tb06609.x. Litchfield, N.J., Van Dissen, R., Sutherland, R., Barnes, P.M., Cox, S.C., Norris, R., Beavan, R.J., Langridge, R., Villamor, P., Berryman, K., Stirling, M., Nicol, A., Nodder, S., Lamarche, G., Barrell, D.J.A., Pettinga, J.R., Little, T., Pondard, N., Mountjoy, J.J., Clark, K., 2013. A model of active faulting in New Zealand. New Zealand Journal of Geology and Geophysics 57, 32-56, doi: 10.1080/00288306.2013.854256. Sibson, R.H., Xie, G., 1998. Dip Range for Intracontinental Reverse Fault Ruptures: Truth Not Stranger than Friction? Bulletin of the Seismological Society of America 88, 1014-1022. GCMT (1976-2016) website SRCMOD website USGS, 2014, National Seismic Hazard Maps - Source Parameters: Interactive Map,
dc.description.obiettivoSpecifico1T. Deformazione crostale attivaen
dc.description.obiettivoSpecifico5T. Modelli di pericolosità sismica e da maremotoen
dc.contributor.authorBasili, Robertoen
dc.contributor.authorTiberti, Mara Monicaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italiaen
dc.contributor.departmentIstituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italiaen
item.fulltextWith Fulltext-
item.openairetypePoster session-
crisitem.classification.parent04. Solid Earth-
crisitem.classification.parent04. Solid Earth-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia-
crisitem.department.parentorgIstituto Nazionale di Geofisica e Vulcanologia- Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia- Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia- Nazionale di Geofisica e Vulcanologia- Nazionale di Geofisica e Vulcanologia-
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