Definition of Seismic Input from Fault-Based PSHA: Remarks After
RESEARCH ARTICLE Definition of Seismic Input From Fault‐Based PSHA: 10.1029/2018TC005086 Remarks After the 2016 Central Italy Special Section: Earthquake Sequence The 2016 Central Italy Seismic Sequence: Insights, implica- A. Valentini1,2, B. Pace1 , P. Boncio1, F. Visini3, A. Pagliaroli2 , and F. Pergalani4 tions and lessons learned 1CRUST‐DiSPUTer Department, Università degli Studi “G. d'Annunzio” di Chieti‐Pescara, Chieti, Italy, 2InGeo Department, Università degli Studi “G. d'Annunzio” di Chieti‐Pescara, Chieti, Italy, 3Istituto Nazionale di Geofisica e Vulcanologia ‐ Key Points: 4 • A fault‐based and time‐dependent Sezione di Pisa, Pisa, Italy, Dipartimento di Ingegneria Civile e Ambientale, Politecnico di Milano, Milan, Italy approaches give a complementary view of PSHA • We provide Input ground motion for Abstract This work focuses on how the progress in earthquake science that follows a large, deeply site effects studies in central Italy studied earthquake might be promptly combined with updated approaches of seismic hazard analysis • We consider this approach useful for reconstruction projects to guide applicative choices for seismic risk reduction, such as postevent seismic microzoning and building design. Both seismic microzoning and seismic design of structures require strong motion records Supporting Information: to perform numerical site response analyses. These records have to be related to the seismotectonic • Supporting Information S1 context and historical seismicity of the investigation area. We first performed a fault‐based probabilistic • Data Set S1 • Data Set S2 seismic hazard analysis in the area struck by the 2016 central Italy seismic sequence to individuate reference uniform hazard spectra at rock conditions. We used two different seismic hazard models, one considering 27 individual seismogenic sources (ISSs), and the second one involving grid point seismicity, Correspondence to: using a fixed‐radius smoothing approach.
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