Guo & Chapman CPA Model

Implement Guo & Chapman Gulf coastal plain amplification (CPA) model as modification to NgaEast and USGS seed tree:

• Add GuoChapman class that loads CPA tables (PP)
• Add placeholder NGA-East GMMs for CPA in Gmm.java (JA)
  • NGS_EAST_USGS_CPA
  • NGS_EAST_USGS_SEEDS_CPA
  • Add two subclasses to NgaEastUsgs_2017.java
    • UsgsSeedsCpa
    • Usgs17Cpa
• Merge spectral ratio calculation (PP & JA)
• Migrate from nshmp-haz to nshmp-lib

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placeholders enums and subclasses added to Gmm.java and NgaEastUsgs_2017.java on github nshmp-haz

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assigned to @pmpowers and unassigned @jaltekruse

changed milestone to %nshmp-lib and -apps improvements

added To Do label

added In Progress label and removed To Do label

marked the checklist item Migrate from nshmp-haz to nshmp-lib as completed

marked the checklist item Merge spectral ratio calculation (PP & JA) as completed

• Required adding custom hard-rock method call that ignores Vs30 for SP16
• Changes will be included in next lib merge request

closed

removed In Progress label

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mentioned in issue #132 (closed)

added 2023 label