from the developer:
Kuanshi Zhong
Fri, May 19, 11:54 AM (5 days ago)
to me
Hi Frank,
We're using the UCERF3 - TD (time dependent). The time dependence probability of a rupture in UCERF3-TD model is conditional on a time duration - so when output the mean annual rate, OpenSHA converts the time-dependent rate to time independent rate (please see more details in the "Example of Coverting Time-Dependent Probability into an Effective Time-Indpendent Rate" on the page 2 of this OpenSHA's tech note:
https://opensha.org/resources/PSHA_Primer_v2_0.pdf).
I think you've directed the user to the "FetchOpenSHA.py" - he should be able to find that Line 218 invokes getMeanAnnualRate() in OpenSHA (
https://github.com/opensha/opensha/blob/8a65cdc9ad27f5c3245688759f6c687ee95eff15/src/main/java/org/opensha/sha/earthquake/ProbEqkRupture.java#L57) to do the above conversion. Just checked that the time span duration used is 30 years.