Coweta's Seismic Design Category, explained

Under the seismic model IBC and ASCE 7 use for new construction, Coweta is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Coweta in the 41th percentile nationally for seismic hazard - higher than 41% of the 4,875 US cities USGS was checked against here.

Where Coweta sits in Oklahoma

The raw figures: peak ground acceleration 0.065g, short-period spectral response 0.135g, 1-second spectral response 0.074g. Among 75 Oklahoma cities in this dataset, Coweta ranks 58 for seismic hazard, the 23th percentile within the state. About 11,093 people live in Coweta, 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.

Earthquake insurance for a Coweta home

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 Coweta address.

More on how this number was built

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