Rolesville, NC: what USGS's seismic model says

Under the seismic model IBC and ASCE 7 use for new construction, Rolesville is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, Rolesville ranks above 32% of the 4,875 cities in this dataset for seismic hazard - the 32th percentile.

Rolesville by the numbers

USGS's underlying values for Rolesville: 0.053g peak ground acceleration, 0.113g at short period, 0.057g at 1 second. Within North Carolina alone, Rolesville ranks 131 of 147 cities by seismic hazard - the 11th percentile in-state. Rolesville has a population of about 11,854.

What a retrofit costs in Rolesville

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.

Earthquake insurance for a Rolesville home

A Rolesville 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 Rolesville's figures come from

Rolesville'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 Rolesville.