Gulfport's Seismic Design Category, explained

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Gulfport in Seismic Design Category A: Lowest seismic design category. Building code requires no seismic-specific detailing here beyond ordinary construction practice. Nationally, Gulfport ranks above 5% of the 4,875 cities in this dataset for seismic hazard - the 5th percentile.

Where Gulfport sits in Florida

The raw figures: peak ground acceleration 0.023g, short-period spectral response 0.05g, 1-second spectral response 0.028g. Among 228 Florida cities in this dataset, Gulfport ranks 137 for seismic hazard, the 40th percentile within the state. About 11,645 people live in Gulfport, Florida.

Retrofit economics for Gulfport

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

More on how this number was built

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