Title: Disaggregation of Probabilistic Ground-Motion Hazard in Italy
Abstract: Research Article| October 01, 2009 Disaggregation of Probabilistic Ground-Motion Hazard in Italy Simone Barani; Simone Barani Dipartimento per lo Studio del Territorio e delle sue Risorse, University of Genoa, Viale Benedetto XV, 5-16132 Genova, [email protected]@dipteris.unige.it Search for other works by this author on: GSW Google Scholar Daniele Spallarossa; Daniele Spallarossa Dipartimento per lo Studio del Territorio e delle sue Risorse, University of Genoa, Viale Benedetto XV, 5-16132 Genova, [email protected]@dipteris.unige.it Search for other works by this author on: GSW Google Scholar Paolo Bazzurro Paolo Bazzurro AIR Worldwide Company, San Francisco, [email protected] Search for other works by this author on: GSW Google Scholar Author and Article Information Simone Barani Dipartimento per lo Studio del Territorio e delle sue Risorse, University of Genoa, Viale Benedetto XV, 5-16132 Genova, [email protected]@dipteris.unige.it Daniele Spallarossa Dipartimento per lo Studio del Territorio e delle sue Risorse, University of Genoa, Viale Benedetto XV, 5-16132 Genova, [email protected]@dipteris.unige.it Paolo Bazzurro AIR Worldwide Company, San Francisco, [email protected] Publisher: Seismological Society of America First Online: 14 Jul 2017 Online ISSN: 1943-3573 Print ISSN: 0037-1106 Bulletin of the Seismological Society of America (2009) 99 (5): 2638–2661. https://doi.org/10.1785/0120080348 Article history First Online: 14 Jul 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Simone Barani, Daniele Spallarossa, Paolo Bazzurro; Disaggregation of Probabilistic Ground-Motion Hazard in Italy. Bulletin of the Seismological Society of America 2009;; 99 (5): 2638–2661. doi: https://doi.org/10.1785/0120080348 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin of the Seismological Society of America Search Advanced Search Abstract Probabilistic seismic hazard analysis is a process that integrates over aleatory uncertainties (e.g., future earthquake locations and magnitudes) to calculate the mean annual rate of exceedance (MRE) of given ground-motion parameter values at a site. These rates reflect the contributions of all the sources whose seismic activity is deemed to affect the hazard at that site. Seismic hazard disaggregation provides insights into the earthquake scenarios driving the hazard at a given ground-motion level. This work presents the disaggregation at each grid point of the Italian rock ground-motion hazard maps developed by Gruppo di Lavoro MPS (2004), Meletti and Montaldo (2007), and Montaldo and Meletti (2007). Disaggregation is used here to compute the contributions to the MRE of peak ground horizontal acceleration (PGA) and 5%-damped 0.2, 1.0, and 2.0 sec spectral acceleration values corresponding to different mean return periods (MRPs of 475 and 2475 yr) from different scenarios. These scenarios are characterized by bins of magnitude, M, source-to-site distance, R, and number, ε, of standard deviations that the ground-motion parameter is away from its median value for that M-R pair as estimated by a prediction equation. Maps showing the geographical distribution of the mean and modal values of M, R, and ε are presented for the first time for all of Italy. Complete joint M–R–ε distributions are also presented for selected cities. Except for sites where the earthquake activity is characterized by sporadic low-magnitude events, the hazard is generally dominated by local seismicity. Moreover, as expected, the MRE of long-period spectral accelerations is generally controlled by large magnitude earthquakes at long distances while smaller events at shorter distances dominate the PGA and short-period spectral acceleration hazard. Finally, for a given site, as the MRP increases the dominant earthquakes tend to become larger and to occur closer to the site investigated. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Publication Year: 2009
Publication Date: 2009-09-23
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 143
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