Allen Park, MI: what USGS's seismic model says

Under the seismic model IBC and ASCE 7 use for new construction, Allen Park is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Rank it against the rest of the country and Allen Park sits at the 32th percentile for seismic hazard among 4,875 US cities.

Allen Park by the numbers

The raw figures: peak ground acceleration 0.053g, short-period spectral response 0.106g, 1-second spectral response 0.047g. Among 153 Michigan cities in this dataset, Allen Park ranks 29 for seismic hazard, the 82th percentile within the state. About 27,604 people live in Allen Park, Michigan.

Retrofit economics for Allen Park

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.

Insuring against this, not just retrofitting

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 Allen Park address.

More on how this number was built

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