Thief River Falls, MN: what USGS's seismic model says

Thief River 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. Nationally, Thief River Falls ranks above 2% of the 4,875 cities in this dataset for seismic hazard - the 2th percentile.

Where Thief River Falls sits in Minnesota

The raw figures: peak ground acceleration 0.021g, short-period spectral response 0.044g, 1-second spectral response 0.016g. Among 155 Minnesota cities in this dataset, Thief River Falls ranks 146 for seismic hazard, the 6th percentile within the state. About 8,779 people live in Thief River Falls, Minnesota.

Bracing and bolting: the actual cost

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for Minnesota. A typical retrofit still runs $5,000-$10,000 nationally, about $7,000 for a common single-family job.

What this means for insurance

Outside California, earthquake coverage is typically sold as an endorsement added to a standard homeowners policy, not a separate product - worth asking about directly when getting a home-insurance quote for a Thief River Falls address.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced Thief River Falls's numbers. The guide to what a Seismic Design Category actually means covers why a category is never a substitute for an engineer's assessment of one specific house.