Eden's Seismic Design Category, explained

Under the seismic model IBC and ASCE 7 use for new construction, Eden is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, Eden ranks above 48% of the 4,875 cities in this dataset for seismic hazard - the 48th percentile.

How Eden compares

The raw figures: peak ground acceleration 0.074g, short-period spectral response 0.148g, 1-second spectral response 0.063g. Among 147 North Carolina cities in this dataset, Eden ranks 82 for seismic hazard, the 45th percentile within the state. About 15,399 people live in Eden, North Carolina.

What a retrofit costs in Eden

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 Eden address.

More on how this number was built

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