Dear all,
after running a PSHA calculation, using a logic tree with different GMPEs, are the outputs given in terms of ‘median’ or ‘mean’ values? Also, how can I extract the standard deviations of the different GMPEs?
Thank you in advance
SD of GMPEs
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- Last Post 16 December 2019
Content_Manager
posted this
09 December 2019
Dear user,
Results of the logic-tree combination will be in terms of average (or mean) hazard. Also, R-CRISIS will generate a file with extension *.pct that contains some percentiles of the hazard measure associated to a given intensity measure value. See an example of *.pct file in the R-CRISIS Help Menu.
On the other hand, the standard deviation of the different GMPEs cannot be extracted directly from R-CRISIS, however, you may look for them in the reference, all GMPEs are added to R-CRISIS just as the authors report in their works.
Thank you for preference and interest in R-CRISIS.
Best regards,
smaritina
posted this
16 December 2019
Dear Mr. Giraldo,
Thank you for your answer. The *.pct file contains indeed some percentiles of the hazard curves. Would you advice the users to construct the different percentiles of the Uniform Hazard spectra (for a given return period), using the hazard curves provided in the *.pct file?
I have used the 'mean' hazard curve to construct the mean UHS and I get results very close to the ones reported by R-CRISIS, but not a perfect match. Where could this difference be attributed to?
Thank you in advance.
