Does Grove, OK need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Grove in Seismic Design Category B: Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Rank it against the rest of the country and Grove sits at the 36th percentile for seismic hazard among 4,875 US cities.

Grove by the numbers

The raw figures: peak ground acceleration 0.059g, short-period spectral response 0.125g, 1-second spectral response 0.078g. Among 75 Oklahoma cities in this dataset, Grove ranks 67 for seismic hazard, the 11th percentile within the state. About 7,327 people live in Grove, 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 Grove 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 Grove address.

More on how this number was built

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