Duluth's Seismic Design Category, explained

Under the seismic model IBC and ASCE 7 use for new construction, Duluth is Category C. Moderate seismic hazard. Code adds irregular-building restrictions and requires bracing of some nonstructural components (e.g. tall shelving, water heaters) in addition to structural detailing. Rank it against the rest of the country and Duluth sits at the 70th percentile for seismic hazard among 4,875 US cities.

Duluth by the numbers

USGS's underlying values for Duluth: 0.101g peak ground acceleration, 0.198g at short period, 0.087g at 1 second. Within Georgia alone, Duluth ranks 62 of 148 cities by seismic hazard - the 59th percentile in-state. Duluth has a population of about 33,157.

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 Georgia 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 Georgia.

Earthquake insurance for a Duluth home

A Duluth 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 Duluth's figures come from

Duluth's Category C 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 C does and doesn't tell you about Duluth.