Corsicana's Seismic Design Category, explained

Corsicana 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. That puts Corsicana in the 20th percentile nationally for seismic hazard - higher than 20% of the 4,875 US cities USGS was checked against here.

Where Corsicana sits in Texas

The raw figures: peak ground acceleration 0.038g, short-period spectral response 0.08g, 1-second spectral response 0.05g. Among 384 Texas cities in this dataset, Corsicana ranks 173 for seismic hazard, the 55th percentile within the state. About 25,591 people live in Corsicana, Texas.

Retrofit economics for Corsicana

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

More on how this number was built

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