Dumfries, VA: what USGS's seismic model says

Under the seismic model IBC and ASCE 7 use for new construction, Dumfries is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, Dumfries ranks above 50% of the 4,875 cities in this dataset for seismic hazard - the 50th percentile.

Dumfries by the numbers

USGS's underlying values for Dumfries: 0.079g peak ground acceleration, 0.148g at short period, 0.045g at 1 second. Within Virginia alone, Dumfries ranks 31 of 63 cities by seismic hazard - the 52th percentile in-state. Dumfries has a population of about 5,978.

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 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.

What this means for insurance

A Dumfries 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 Dumfries's figures come from

Dumfries'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 Dumfries.