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Olafsson, Simon
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- ProductOpen AccessThe WEB development of the UPStrat-MAFA project(2012-09-24)
; ; ; ;Sansivero, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia ;Zonno, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italia ;Olafsson, S.; Earthquake Engineering Research Centre, Iceland; ; 157 173 - PublicationOpen AccessCalibration of input parameters in volcanic areas and an enlarged dataset by stochastic finite-fault simulations(2012-09-24)
; ; ; ; ; ; ; ; ; ; ; ;Galluzzo, D.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia ;Bianco, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia ;Cusano, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia ;Langer, H.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia ;Scarfì, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia ;Tusa, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia ;Zonno, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italia ;Carvalho, A.; Laboratorio Nacional de Engenharia Civili, Portugal ;Olafsson, S.; Earthquake Engineering Research Centre, Iceland ;Rupakhety, R.; Earthquake Engineering Research Centre, Iceland ;Sigbjornsson, R.; Earthquake Engineering Research Centre, Iceland; ; ; ; ; ; ; ; ; ; The calibration of input parameters is an important task for stochastic finite-fault simulation in volcanic areas, and we manage this in the framework of the European project UPStrat-MaFa. The stochastic simulation method requires the knowledge of fault geometry, source, crust properties of the region, and local site effects. At first, we focused the present study in the pilot test areas: Mt Vesuvius, Campi Flegrei and Mt Etna. Later, we performed two applications for a large magnitude event in the Azores Islands and the South Iceland regions. A general preliminary database of ground-motion records was collected in the test areas, to set up the empirical laws of the ground-motion parameters. The results of the simulations have been compared with observed waveforms and response spectra, to determine the suitability of the parameters used. The results show good agreement between the observed and simulated time histories and response spectra, thus encouraging further efforts towards quantitative high resolution studies on input parameters.250 130 - PublicationOpen AccessUrban Disaster-Prevention Strategies Using Macroseismic Fields and Fault Sources(2012-09-24)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;Zonno, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italia ;Azzaro, R.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia ;Bianco, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia ;Cusano, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia ;D'Amico, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia ;D’Amico, V.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italia ;Falsaperla, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia ;Galluzzo, D.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia ;Langer, H.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia ;Meroni, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Milano-Pavia, Milano, Italia ;Musacchio, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione AC, Roma, Italia ;Nave, R.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia ;Sansivero, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione OV, Napoli, Italia ;Scarfì, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia ;Rotondi, R.; Consiglio Nazionale delle Ricerche – Istituto di Matematica Applicata e Tecnologie Informatiche, Italy ;Brambilla, C.; Consiglio Nazionale delle Ricerche – Istituto di Matematica Applicata e Tecnologie Informatiche, Italy ;Varini, E.; Consiglio Nazionale delle Ricerche – Istituto di Matematica Applicata e Tecnologie Informatiche, Italy ;Oliveira, C. S.; Instituto Superior Tecnico, Portugal ;Ferreira, M. A.; Instituto Superior Tecnico, Portugal ;Lopes, M.; Instituto Superior Tecnico, Portugal ;Mota de Sá, F.; Instituto Superior Tecnico, Portugal ;Nunes, J. C.; Instituto Superior Tecnico, Portugal ;Carvalho, A.; Laboratorio Nacional de Engenharia Civil, Portugal ;Sousa, M. L.; Laboratorio Nacional de Engenharia Civil, Portugal ;Raposo, S.; Laboratorio Nacional de Engenharia Civil, Portugal ;Garcia-Fernandez, M.; Agencia Estatal Consejo Superior de Investigaciones Cientificas, Spain ;Beltran, A.; Agencia Estatal Consejo Superior de Investigaciones Cientificas, Spain ;Jenni, J.; Agencia Estatal Consejo Superior de Investigaciones Cientificas, Spain ;Jimenez, M. J.; Agencia Estatal Consejo Superior de Investigaciones Cientificas, Spain ;Sigbjornsson, R.; Earthquake Engineering Research Centre, Iceland ;Bernhardsdottir, A.; Earthquake Engineering Research Centre, Iceland ;Olafsson, S.; Earthquake Engineering Research Centre, Iceland ;Rupakhety, R.; Earthquake Engineering Research Centre, Iceland ;Sigurdsson, S. U.; Earthquake Engineering Research Centre, Iceland ;Thorvaldsdottir, S.; Earthquake Engineering Research Centre, Iceland ;Albarello, D.; University of Siena, Italy; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; This contribution presents the general framework of the European project UPStrat-MAFA "Urban disaster Prevention Strategies using MAcroseismic Fields and FAult Sources" and its ongoing activities. A unique probabilistic procedure is being used for seismic hazard evaluation, using both macroseismic fields and characteristics of fault sources for the analysis of data from volcanic and tectonic areas: Mt. Etna, Mt. Vesuvius and Campi Flegrei (Italy), Azores Islands (Portugal), South Iceland (Iceland), Alicante-Murcia (Spain), and mainland and offshore Portugal. An improvement of urban scale vulnerability information on building and network systems (typologies, schools, strategic buildings, lifelines, and others) is proposed in the form of a global Disruption Index, with the objective to provide a systematic way of measuring earthquake impact in urbanized areas considered as complex networks. Disaster prevention strategies are considered based on an education information system, another effective component of the disaster risk reduction given by long-term activities.523 244 - PublicationOpen AccessNon-Structural Risk Evaluation: Experiences From Pilot Areas Of The Knowrisk Project(The European Association for Earthquake Engineering, 2018-06-18)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; This paper presents a multidisciplinary approach to quantify seismic hazard and ground motion intensity parameters for non-structural seismic risk evaluation. In the framework of the European KnowRISK Project, three pilot areas were selected for testing different methodological approaches aimed at evaluating elements and measures to reduce seismic risk coming along with the failure of non-structural elements. At Mt. Etna, Italy, instrumental and historical macroseismic data are used to generate ground motion time series for different scenario events. Risk maps for non-structural damage are generated by using building vulnerability from census data and a damage model based on fragility curves; interstory drift spectra have been also calculated for a representative test site. In South Iceland, scenarios are defined basing on the June 2000 seismic sequence, which provided strong-motion data at several locations. The recorded data and other parameters of the source are used to perform finite-fault simulations of ground motion at different locations in the area and then to calculate interstory drift spectra. In Portugal a scenario referring to the Lower Tagus Valley was selected and finite-fault simulations for the nearby city of Lisbon were performed.170 64