Spanish Fort, AL: what USGS's seismic model says

Spanish Fort 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 Spanish Fort in the 26th percentile nationally for seismic hazard - higher than 26% of the 4,875 US cities USGS was checked against here.

Spanish Fort by the numbers

The raw figures: peak ground acceleration 0.045g, short-period spectral response 0.093g, 1-second spectral response 0.06g. Among 107 Alabama cities in this dataset, Spanish Fort ranks 94 for seismic hazard, the 12th percentile within the state. About 11,118 people live in Spanish Fort, Alabama.

Retrofit economics for Spanish Fort

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 Spanish Fort address.

More on how this number was built

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