MA05 Puerto Rico subduction GMM interpolation issues

MA05 base (no site scaling) and MA05 (with BA08 site scaling) models both have interpolation problems.

• MA05 must be interpolated for 0.02, 0.03, 0.05, 0.75, 0.15, and 0.75 sec.
• BA08 site scaling must be interpolated for 0.06, 0.08, 0.12, 0.16, 0.6, and 0.8 sec.

This example is from the spectra web tool for M8, zTor 0.5, Rrup 50, vs30 365:

changed milestone to %Finalize 2023 NSHM and ongoing GMM work

assigned to @jaltekruse

Response spectra is bumpy (after fixing the broken interpolation) - the original model is developed in frequency space, so could this be a result of interpolating in period-space instead of Hz?

changed the description

mentioned in merge request !410 (merged)

Corrected spectra (still a bit bumpy, same image as the MR):

mentioned in commit 4b0a361d

closed with merge request !410 (merged)