Does Milan, MI need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Milan in Seismic Design Category B: Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, Milan ranks above 34% of the 4,875 cities in this dataset for seismic hazard - the 34th percentile.

Milan by the numbers

The raw figures: peak ground acceleration 0.057g, short-period spectral response 0.113g, 1-second spectral response 0.049g. Among 153 Michigan cities in this dataset, Milan ranks 17 for seismic hazard, the 89th percentile within the state. About 6,048 people live in Milan, Michigan.

Retrofit economics for Milan

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.

Earthquake insurance for a Milan home

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 Milan address.

More on how this number was built

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