Shawnee's Seismic Design Category, explained

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Shawnee in Seismic Design Category B: Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Shawnee in the 60th percentile nationally for seismic hazard - higher than 60% of the 4,875 US cities USGS was checked against here.

Shawnee by the numbers

The raw figures: peak ground acceleration 0.134g, short-period spectral response 0.238g, 1-second spectral response 0.077g. Among 75 Oklahoma cities in this dataset, Shawnee ranks 32 for seismic hazard, the 58th percentile within the state. About 32,092 people live in Shawnee, 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 Shawnee address.

More on how this number was built

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