Holly Ridge, NC: what USGS's seismic model says

Holly Ridge 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. Rank it against the rest of the country and Holly Ridge sits at the 37th percentile for seismic hazard among 4,875 US cities.

Where Holly Ridge sits in North Carolina

The raw figures: peak ground acceleration 0.061g, short-period spectral response 0.124g, 1-second spectral response 0.058g. Among 147 North Carolina cities in this dataset, Holly Ridge ranks 103 for seismic hazard, the 30th percentile within the state. About 5,766 people live in Holly Ridge, North Carolina.

What a retrofit costs in Holly Ridge

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.

Insuring against this, not just retrofitting

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 Holly Ridge address.

More on how this number was built

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