Does Roanoke, AL need an earthquake retrofit?

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. That puts Roanoke in the 50th percentile nationally for seismic hazard - higher than 50% of the 4,875 US cities USGS was checked against here.

Where Roanoke sits in Alabama

USGS's underlying values for Roanoke: 0.08g peak ground acceleration, 0.161g at short period, 0.081g at 1 second. Within Alabama alone, Roanoke ranks 68 of 107 cities by seismic hazard - the 37th percentile in-state. Roanoke has a population of about 5,424.

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 Alabama 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 Alabama.

What this means for insurance

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.