Ansonia, CT: what USGS's seismic model says

Under the seismic model IBC and ASCE 7 use for new construction, Ansonia is 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 Ansonia sits at the 59th percentile for seismic hazard among 4,875 US cities.

Where Ansonia sits in Connecticut

USGS's underlying values for Ansonia: 0.113g peak ground acceleration, 0.201g at short period, 0.054g at 1 second. Within Connecticut alone, Ansonia ranks 9 of 21 cities by seismic hazard - the 60th percentile in-state. Ansonia has a population of about 19,195.

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 Connecticut 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 Connecticut.

Earthquake insurance for a Ansonia home

A Ansonia 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 Ansonia's figures come from

Ansonia'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 Ansonia.