Roanoke's Seismic Design Category, explained

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Roanoke in Seismic Design Category B: 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 Roanoke sits at the 57th percentile for seismic hazard among 4,875 US cities.

How Roanoke compares

USGS's underlying values for Roanoke: 0.105g peak ground acceleration, 0.191g at short period, 0.064g at 1 second. Within Virginia alone, Roanoke ranks 18 of 63 cities by seismic hazard - the 73th percentile in-state. Roanoke has a population of about 97,912.

Retrofit economics for Roanoke

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 Virginia 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 Virginia.

Earthquake insurance for a Roanoke home

A Roanoke 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 Roanoke's figures come from

Roanoke'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 Roanoke.