Does Cynthiana, KY need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Cynthiana 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 Cynthiana sits at the 53th percentile for seismic hazard among 4,875 US cities.

Cynthiana by the numbers

The raw figures: peak ground acceleration 0.088g, short-period spectral response 0.173g, 1-second spectral response 0.082g. Among 79 Kentucky cities in this dataset, Cynthiana ranks 56 for seismic hazard, the 29th percentile within the state. About 6,557 people live in Cynthiana, Kentucky.

Bracing and bolting: the actual cost

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for Kentucky. A typical retrofit still runs $5,000-$10,000 nationally, about $7,000 for a common single-family job.

Earthquake insurance for a Cynthiana 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 Cynthiana address.

More on how this number was built

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