2023 NSHM: Updated polygons and basin data for Bay Area and Los Angeles

For the 2023 NSHM for CONUS:

Bay Area Basin

• Brad Aagaard proposed a new San Francisco Bay Area basin polygon, which extends the old polygon offshore to avoid an artificial boundary in the west. He provided a new polygon (attached geojson file) and Zx values (attached .csv file). The Zx values come from Brad's updated model for the Bay Area.Bay_Area_Aagaard_email.pdf

sfbay-alt_boundary.geojson

sfbay-area-alt_zx.csv

Los Angeles Basin

• Brad Aagaard proposed a new Los Angeles basin polygon, which eliminates regions with artificially shallow basin depths. He provided a new polygon (attached geojson file) and Zx values (attached .csv file). The Zx values come from the SCEC CVM-S4.26m01 model, as before, and he expects the values to be within 10km of the values used previously. Los_Angeles_Aagaard_email.pdf

los-angeles-2023_boundary.geojson

los-angeles-2023_zx.csv

changed due date to February 16, 2023

added 2023 label

assigned to @ashumway

When Brad delivers geojson files, he has them formatted as "Feature Collection", which is not the format we use. I removed the Feature Collection in each geojson, and also renamed them, based on our current naming convention. I renamed the .csv files as well, which are in the correct format and do not require any modifications. I've attached the ready to use files here.

bay-area.csv

bay-area.geojson

los-angeles.geojson

los-angeles.csv

mentioned in merge request !83 (merged)

Updated files have been merged. However, I note gaps along the shared boundary between SF-Bay and Central Valley.

Resolved in !83 (merged)

closed