OpenQuake 0.3 Risk Classical_PSHA_Based_Risk_Calculator

The GEM Risk calculator is capable of computing losses due to all the possible seismic events that might occur within a given time span using a classical PSHA-based approach. The main product from these calculations will be loss/loss ratio curves although, loss/loss ratio maps for different probabilities of exceedance as well as average loss/loss ratio maps can also be computed.

Notes

• Assumptions

  • Discrete vulnerability functions (in nrml format)
  • Exposure data (in nrml format)
  • Probability mass functions (in nrml format)

• Design For this type of assessment, a hazard engine needs to use Classical PSHA to produce hazard curves for the sites where the assets are located. Moreover, this set of hazard curves need to be converted into mass probability functions which will basically provide to the risk engine, the probability of occurrence of each intensity measure level. Given this set of probabilities, the risk engine will compute the expected loss ratio for each asset, and by multiplying this fraction for the value of the asset, the actual loss is computed.

• User stories:

  • Port risk engine to Python - Framework.
  • Port risk engine to Python - Loss Curve Calculations.
  • Calculate PO from PE for loss and loss ratio curves.

• Suggested Implementation

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