Norton Shores, MI: what USGS's seismic model says

Under the seismic model IBC and ASCE 7 use for new construction, Norton Shores is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, Norton Shores ranks above 18% of the 4,875 cities in this dataset for seismic hazard - the 18th percentile.

Where Norton Shores sits in Michigan

The raw figures: peak ground acceleration 0.035g, short-period spectral response 0.073g, 1-second spectral response 0.045g. Among 153 Michigan cities in this dataset, Norton Shores ranks 119 for seismic hazard, the 22th percentile within the state. About 25,070 people live in Norton Shores, Michigan.

Retrofit economics for Norton Shores

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 Norton Shores 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 Norton Shores address.

More on how this number was built

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