San Angelo's Seismic Design Category, explained

Under the seismic model IBC and ASCE 7 use for new construction, San Angelo is Category A. Lowest seismic design category. Building code requires no seismic-specific detailing here beyond ordinary construction practice. Rank it against the rest of the country and San Angelo sits at the 10th percentile for seismic hazard among 4,875 US cities.

How San Angelo compares

The raw figures: peak ground acceleration 0.028g, short-period spectral response 0.06g, 1-second spectral response 0.025g. Among 384 Texas cities in this dataset, San Angelo ranks 283 for seismic hazard, the 26th percentile within the state. About 100,159 people live in San Angelo, Texas.

Bracing and bolting: the actual cost

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.

Earthquake insurance for a San Angelo home

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 San Angelo address.

More on how this number was built

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