Does Fergus Falls, MN need an earthquake retrofit?

Fergus Falls carries Seismic Design Category A under USGS's ASCE 7-16 model. Lowest seismic design category. Building code requires no seismic-specific detailing here beyond ordinary construction practice. That puts Fergus Falls in the 13th percentile nationally for seismic hazard - higher than 13% of the 4,875 US cities USGS was checked against here.

Where Fergus Falls sits in Minnesota

USGS's underlying values for Fergus Falls: 0.035g peak ground acceleration, 0.072g at short period, 0.021g at 1 second. Within Minnesota alone, Fergus Falls ranks 2 of 155 cities by seismic hazard - the 99th percentile in-state. Fergus Falls has a population of about 14,258.

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 Minnesota 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 Minnesota.

Insuring against this, not just retrofitting

A Fergus Falls 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 Fergus Falls's figures come from

Fergus Falls's Category A 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 A does and doesn't tell you about Fergus Falls.