Woodfin, NC: what USGS's seismic model says

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Woodfin in Seismic Design Category C: 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. Rank it against the rest of the country and Woodfin sits at the 76th percentile for seismic hazard among 4,875 US cities.

How Woodfin compares

The raw figures: peak ground acceleration 0.175g, short-period spectral response 0.302g, 1-second spectral response 0.094g. Among 147 North Carolina cities in this dataset, Woodfin ranks 4 for seismic hazard, the 98th percentile within the state. About 8,158 people live in Woodfin, North Carolina.

What a retrofit costs in Woodfin

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

More on how this number was built

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