Fort Atkinson, WI: what USGS's seismic model says

Fort Atkinson carries Seismic Design Category B under USGS's ASCE 7-16 model. 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 Fort Atkinson sits at the 20th percentile for seismic hazard among 4,875 US cities.

Fort Atkinson by the numbers

The raw figures: peak ground acceleration 0.039g, short-period spectral response 0.08g, 1-second spectral response 0.05g. Among 157 Wisconsin cities in this dataset, Fort Atkinson ranks 31 for seismic hazard, the 81th percentile within the state. About 12,377 people live in Fort Atkinson, Wisconsin.

Retrofit economics for Fort Atkinson

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

Insuring against this, not just retrofitting

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 Fort Atkinson address.

More on how this number was built

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