Does Tahlequah, OK need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Tahlequah in Seismic Design Category B: Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Tahlequah in the 42th percentile nationally for seismic hazard - higher than 42% of the 4,875 US cities USGS was checked against here.

Where Tahlequah sits in Oklahoma

The raw figures: peak ground acceleration 0.066g, short-period spectral response 0.139g, 1-second spectral response 0.078g. Among 75 Oklahoma cities in this dataset, Tahlequah ranks 57 for seismic hazard, the 24th percentile within the state. About 17,319 people live in Tahlequah, Oklahoma.

What a retrofit costs in Tahlequah

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 Tahlequah 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 Tahlequah address.

More on how this number was built

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