Does Wayne, MI need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, Wayne is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, Wayne ranks above 31% of the 4,875 cities in this dataset for seismic hazard - the 31th percentile.

Where Wayne sits in Michigan

USGS's underlying values for Wayne: 0.052g peak ground acceleration, 0.105g at short period, 0.047g at 1 second. Within Michigan alone, Wayne ranks 37 of 153 cities by seismic hazard - the 76th percentile in-state. Wayne has a population of about 17,129.

Retrofit economics for Wayne

A full earthquake retrofit typically runs $5,000-$10,000 nationally (around $7,000 typical), driven mainly by house size and foundation type, not by Michigan specifically. California's Earthquake Brace + Bolt grant, which covers a large share of this cost, is a California-only program and does not apply in Michigan.

Insuring against this, not just retrofitting

A Wayne homeowner cannot buy a standalone earthquake policy in most cases - it is added to an existing homeowners policy as an endorsement, so the place to start is a regular home-insurance quote.

Where Wayne's figures come from

Wayne's Category B and every number above trace to USGS's own ASCE 7-16 Design Maps service - see the methodology guide. See the category explainer for what Category B does and doesn't tell you about Wayne.