OpenQuake for Advanced Users

Contents:

• Introduction
• Common mistakes: bad configuration parameters
  • The quadratic parameters
  • Intensity measure types and levels
  • pointsource_distance
  • concurrent_tasks parameter
• Tips for running large hazard calculations
  • The first thing to do
  • Case study: GMFs for California
  • Disaggregation
• Tips for running large risk calculations
  • Understanding the hazard
  • Collapsing of branches
  • Calculation by region
  • Trimming of the logic-trees or sampling of the branches
  • Ignoring the coefficients of variations
  • The ebrisk calculator
  • Differences with the event_based_risk calculator
• The concept of effective realizations
  • Reduction of the logic tree
  • How to analyze the logic tree of a calculation without running the calculation
  • The realization-association object
• Extra tips specific to event based calculations
  • An example with a large logic tree (full enumeration)
  • Reduction of the logic tree when sampling is enabled
  • Convergency of the GMFs for non-trivial logic trees
• Extracting data from calculations
  • Plotting
• Parametric GMPEs
  • Signature of a GMPE class
  • GMPETable
  • File-dependent GMPEs
  • MultiGMPE
  • GenericGmpeAvgSA
• MultiPointSources
• How the parallelization works in the engine
  • How to use openquake.baselib.parallel
• Special features of the engine
  • GMPE logic trees with minimum_distance
  • GMPE logic trees with weighted IMTs
  • Equivalent Epicenter Distance Approximation
• How the hazard sites are determined
• The relation between asset locations and hazard sites
  • The case with explicit sites and no site model
• Advanced risk features
  • Taxonomy mapping