Chickasaw's Seismic Design Category, explained

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Chickasaw in Seismic Design Category B: Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, Chickasaw ranks above 26% of the 4,875 cities in this dataset for seismic hazard - the 26th percentile.

How Chickasaw compares

The raw figures: peak ground acceleration 0.046g, short-period spectral response 0.096g, 1-second spectral response 0.061g. Among 107 Alabama cities in this dataset, Chickasaw ranks 92 for seismic hazard, the 14th percentile within the state. About 6,241 people live in Chickasaw, Alabama.

What a retrofit costs in Chickasaw

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for Alabama. 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 Chickasaw address.

More on how this number was built

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