Verdigris, OK: what USGS's seismic model says

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Verdigris in Seismic Design Category B: Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Verdigris in the 36th percentile nationally for seismic hazard - higher than 36% of the 4,875 US cities USGS was checked against here.

Verdigris by the numbers

The raw figures: peak ground acceleration 0.059g, short-period spectral response 0.125g, 1-second spectral response 0.073g. Among 75 Oklahoma cities in this dataset, Verdigris ranks 68 for seismic hazard, the 9th percentile within the state. About 5,775 people live in Verdigris, Oklahoma.

Bracing and bolting: the actual cost

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

What this means for insurance

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 Verdigris address.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced Verdigris'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.