Add basin effects to non-NGAW2 GMMs

usgs / nshmp-haz

National Seismic Hazard Mapping Project (NSHMP) Code

Other

37 stars 31 forks source link

Add basin effects to non-NGAW2 GMMs #256

Closed pmpowers-usgs closed 6 years ago

pmpowers-usgs commented 7 years ago

In order to consider basin effects everywhere throughout the WUS, subduction interface and slab GMMs need to have an amplification term added. Art Frankel recommended we use the Campbell and Bozorgnia 2014 (NGAW2, z2p5) model. This needs to be added to BcHydro, Atkinson & Macias, and Zhao06. In order to not disrupt the existing models, this additions should be handled via subclasses that will have their own identifiers (e.g. ZHAO_06_INTER_BASIN).

[x] Expose CB14 basin term
[x] A&M09 subclass
[x] BcHydro12 subclasses
[x] Zhao06 refine site-vs30 interpolation
[x] Expose Zhao16 site class
[x] Refactor exiting SiteClass to GmmUtils.CeusSiteClass
[x] Clean Zhao06 coeffs to match pub; precision

pmpowers-usgs commented 7 years ago

The addition of the CB14 basin amplification model necessitated the deprecation of several periods variously available in the original subduction GMMs: [0.6, 0.7, 0.8, 0.9, 1.25, 2.5, 6.0]

ashumway-usgs commented 6 years ago

After further discussion about modification to the subduction GMMs to include the CB14 basin term we have decided that we need to remove the Vs30 term (and any implied basin terms) from the subduction GMMs and then add the CB14 Vs30 and basin terms to the GMMs. Simply adding the CB14 basin term without removing the original Vs30 term is incorrect?