Vienna's Seismic Design Category, explained

Under the seismic model IBC and ASCE 7 use for new construction, Vienna is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Vienna in the 34th percentile nationally for seismic hazard - higher than 34% of the 4,875 US cities USGS was checked against here.

Vienna by the numbers

USGS's underlying values for Vienna: 0.056g peak ground acceleration, 0.114g at short period, 0.056g at 1 second. Within West Virginia alone, Vienna ranks 16 of 26 cities by seismic hazard - the 40th percentile in-state. Vienna has a population of about 10,406.

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 West 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 West Virginia.

Insuring against this, not just retrofitting

A Vienna 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 Vienna's figures come from

Vienna'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 Vienna.