Jackson, WY: what USGS's seismic model says

Under the seismic model IBC and ASCE 7 use for new construction, Jackson is Category D. High seismic hazard - this is the category most of coastal California, the Pacific Northwest, and other active fault regions fall into. Code mandates significant seismic detailing and restricts irregular structural configurations. This is the category the Brace + Bolt scope (cripple-wall bracing, foundation bolting) is built for. That puts Jackson in the 89th percentile nationally for seismic hazard - higher than 89% of the 4,875 US cities USGS was checked against here.

Jackson by the numbers

The raw figures: peak ground acceleration 0.461g, short-period spectral response 1.04g, 1-second spectral response 0.343g. Among 16 Wyoming cities in this dataset, Jackson ranks 1 for seismic hazard, the 100th percentile within the state. About 10,680 people live in Jackson, Wyoming.

Retrofit economics for Jackson

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for Wyoming. A typical retrofit still runs $5,000-$10,000 nationally, about $7,000 for a common single-family job.

Insuring against this, not just retrofitting

Outside California, earthquake coverage is typically sold as an endorsement added to a standard homeowners policy, not a separate product - worth asking about directly when getting a home-insurance quote for a Jackson address.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced Jackson's numbers. The guide to what a Seismic Design Category actually means covers why a category is never a substitute for an engineer's assessment of one specific house.