Guymon, OK: what USGS's seismic model says

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Guymon in Seismic Design Category A: Lowest seismic design category. Building code requires no seismic-specific detailing here beyond ordinary construction practice. Rank it against the rest of the country and Guymon sits at the 15th percentile for seismic hazard among 4,875 US cities.

Guymon by the numbers

The raw figures: peak ground acceleration 0.054g, short-period spectral response 0.109g, 1-second spectral response 0.039g. Among 75 Oklahoma cities in this dataset, Guymon ranks 75 for seismic hazard, the 0th percentile within the state. About 12,397 people live in Guymon, 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 Guymon 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 Guymon address.

More on how this number was built

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