Horizon City's Seismic Design Category, explained

Horizon City carries Seismic Design Category C under USGS's ASCE 7-16 model. Moderate seismic hazard. Code adds irregular-building restrictions and requires bracing of some nonstructural components (e.g. tall shelving, water heaters) in addition to structural detailing. Nationally, Horizon City ranks above 72% of the 4,875 cities in this dataset for seismic hazard - the 72th percentile.

How Horizon City compares

The raw figures: peak ground acceleration 0.127g, short-period spectral response 0.287g, 1-second spectral response 0.094g. Among 384 Texas cities in this dataset, Horizon City ranks 4 for seismic hazard, the 99th percentile within the state. About 24,802 people live in Horizon City, Texas.

What a retrofit costs in Horizon City

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 Horizon City address.

More on how this number was built

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