Bluffton, IN: what USGS's seismic model says

Under the seismic model IBC and ASCE 7 use for new construction, Bluffton is 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 Bluffton sits at the 43th percentile for seismic hazard among 4,875 US cities.

Bluffton by the numbers

The raw figures: peak ground acceleration 0.067g, short-period spectral response 0.132g, 1-second spectral response 0.067g. Among 126 Indiana cities in this dataset, Bluffton ranks 78 for seismic hazard, the 38th percentile within the state. About 10,556 people live in Bluffton, Indiana.

What a retrofit costs in Bluffton

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

What this means for insurance

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 Bluffton address.

More on how this number was built

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