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hazard [2015/12/29 11:49]
Marco Pagani
hazard [2016/05/23 17:46]
Julio Garcia
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-====== ​Seismic ​Hazard ​Assessment ​======+[[start| Back to the SARA Project main page]] 
 +====== ​The Hazard ​Component of the SARA Project ​======
  
 Seismic hazard modelling in South America presents scientists and engineers with a diverse set of challenges. Incorporating some of the most seismically active regions on the planet, and including many of the largest earthquakes ever recorded, the South American subduction zone dominantes the earthquake hazard in the west of the continent and provides the principal tectonic force driving the shallow non-subduction earthquakes in western Argentina, Bolivia, Ecuador, Peru and Colombia. In addition to the tectonic complexity, further challenges arise due to the current state of knowledge, with inhomogeneous characterisation of seismicity, active faulting and strong motions between different countries. ​ Seismic hazard modelling in South America presents scientists and engineers with a diverse set of challenges. Incorporating some of the most seismically active regions on the planet, and including many of the largest earthquakes ever recorded, the South American subduction zone dominantes the earthquake hazard in the west of the continent and provides the principal tectonic force driving the shallow non-subduction earthquakes in western Argentina, Bolivia, Ecuador, Peru and Colombia. In addition to the tectonic complexity, further challenges arise due to the current state of knowledge, with inhomogeneous characterisation of seismicity, active faulting and strong motions between different countries. ​
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   * [[hazard_rt3|Research Topic 3 (RT3):]] Modelling Subduction Zones in South America   * [[hazard_rt3|Research Topic 3 (RT3):]] Modelling Subduction Zones in South America
   * [[hazard_rt4|Research Topic 4 (RT4):]] The South American Earthquake Catalogue   * [[hazard_rt4|Research Topic 4 (RT4):]] The South American Earthquake Catalogue
-  * [[hazard_rt5|Research Topic 5 (RT5):]] A strain-rate model for South America 
   * [[hazard_rt6|Research Topic 6 (RT6):]] A South American Strong Motion Database and Selection of ground motion prediction equations (GMPEs) for seismic hazard analysis in South America   * [[hazard_rt6|Research Topic 6 (RT6):]] A South American Strong Motion Database and Selection of ground motion prediction equations (GMPEs) for seismic hazard analysis in South America
   * [[hazard_rt7|Research Topic 7 (RT7):]] Creation of a new PSHA input model for South America and calculation of results   * [[hazard_rt7|Research Topic 7 (RT7):]] Creation of a new PSHA input model for South America and calculation of results
- +[[startBack to the SARA Project main page]]
-==== Topic 1: Current status ==== +
-//Define the current state-of-the-art of seismic hazard in the region by collecting available PSHA models and porting them into OpenQuake engine format.// +
- +
-Building a new seismic hazard model does not mean overlooking the past, previous and currently under-development models should be considered in the creation of a new regional model to ensure consistent and continuous improvement of models used to compute a probabilistic seismic hazard assessment (PSHA) study. In this context, the primary task to be achieved by the hazard component was to appraise the current **state-of-the-art** in (PSHA) in the South American region.  +
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-==== Topic 2: Active faults ==== +
-//Build a harmonized database of shallow active faults.// +
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-[[hazard:​topic2|Topic 2]] +
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-==== Topic 3: Subduction ==== +
-//Creating a PSHA seismicity occurrence model for the subduction structures along the western coast of South America.//​ +
- +
-The areas along the west coast of South America where the Nazca Plate subducts beneath the South American Plate, with a rate of 7/8 cm/yr, are exposed to high level of seismic risk. This process is capable of generating a M>= 8 earthquake roughly every decade and a M>9 earthquake every century (DeMets et al., 1980; Norabuena et al., 1999). Several interpretations of the subduction process for South America have been proposed in the recent scientific literature, but from a hazard perspective,​ little of this information was incorporated into seismic source modes at present. +
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-This topic therefore is focusing on the collection of information useful for the characterization of the subduction process along the western coast of South America and the creation of a uniform model to be used in PSHA analysis. The task will be focused on defining the subduction geometry and its segmentation starting from recently developed global models of subduction geometry such as SLAB 1.0 (Hayes and Wald, 2009; Hayes et al., 2012), parametric investigations by Heuret et al. (2011) and subduction segments included in national PSHA models. The primary outcome of this task will be to define a model of the subduction interface with the aim of ensuring consistency with the OpenQuake-engine complex fault typology, which is designed for application in subduction environments.+
  • hazard.txt
  • Last modified: 2016/05/23 17:46
  • by Julio Garcia