2023 CEUS GMM updates

GMMs

• Pezeshk 2018 ??

Vs30 Site Amplification

• Hashash non-linear long-T adjustment (needs committing)
• Harmon et al.?

Gulf Coast options under active consideration:

• Chapman and Guo (zSed) #73 (closed) #125 (closed) #128 (closed)
• NGA-East path length #126
• Pezeshk 2021 ??

@olboyd @mmoschetti

added GMM label

I've coded up Harmon et al (L4+N1, K1) for comparison with Chapman and Guo and use in the Coastal Plains (and in other regions of the CEUS where we have sediment thickness). It's pretty interesting and would require some discussion and, of course, additional analysis.

@pmpowers @mmoschetti

We'll create a new issue for the Harmon implementation

added 2023 label

Gulf Coast implementation with relevant new *_2023 GMMs completed in !268 (merged) !271 (merged) and !272 (merged)
Other Gulf Coast models to be tracked with separate issues.

Hashash et al. (2020) non-lin completed in !273 (merged)

closed

mentioned in issue #154