Carolina Beach, NC: what USGS's seismic model says

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Carolina Beach in Seismic Design Category B: Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, Carolina Beach ranks above 50% of the 4,875 cities in this dataset for seismic hazard - the 50th percentile.

Where Carolina Beach sits in North Carolina

USGS's underlying values for Carolina Beach: 0.081g peak ground acceleration, 0.16g at short period, 0.07g at 1 second. Within North Carolina alone, Carolina Beach ranks 72 of 147 cities by seismic hazard - the 51th percentile in-state. Carolina Beach has a population of about 6,864.

Bracing and bolting: the actual cost

A full earthquake retrofit typically runs $5,000-$10,000 nationally (around $7,000 typical), driven mainly by house size and foundation type, not by North Carolina specifically. California's Earthquake Brace + Bolt grant, which covers a large share of this cost, is a California-only program and does not apply in North Carolina.

Insuring against this, not just retrofitting

A Carolina Beach homeowner cannot buy a standalone earthquake policy in most cases - it is added to an existing homeowners policy as an endorsement, so the place to start is a regular home-insurance quote.

Where Carolina Beach's figures come from

Carolina Beach's Category B and every number above trace to USGS's own ASCE 7-16 Design Maps service - see the methodology guide. See the category explainer for what Category B does and doesn't tell you about Carolina Beach.