Grand Prairie, TX: what USGS's seismic model says

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Grand Prairie in Seismic Design Category B: Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Grand Prairie in the 24th percentile nationally for seismic hazard - higher than 24% of the 4,875 US cities USGS was checked against here.

How Grand Prairie compares

The raw figures: peak ground acceleration 0.043g, short-period spectral response 0.091g, 1-second spectral response 0.052g. Among 384 Texas cities in this dataset, Grand Prairie ranks 136 for seismic hazard, the 65th percentile within the state. About 207,331 people live in Grand Prairie, 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.

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 Grand Prairie address.

More on how this number was built

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