Flint, MI: what USGS's seismic model says

Flint 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 Flint in the 13th percentile nationally for seismic hazard - higher than 13% of the 4,875 US cities USGS was checked against here.

Where Flint sits in Michigan

The raw figures: peak ground acceleration 0.038g, short-period spectral response 0.078g, 1-second spectral response 0.042g. Among 153 Michigan cities in this dataset, Flint ranks 126 for seismic hazard, the 18th percentile within the state. About 79,735 people live in Flint, Michigan.

Retrofit economics for Flint

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for Michigan. 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 Flint address.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced Flint'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.