Swartz Creek, MI: what USGS's seismic model says

Under the seismic model IBC and ASCE 7 use for new construction, Swartz Creek 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 Swartz Creek sits at the 20th percentile for seismic hazard among 4,875 US cities.

Swartz Creek by the numbers

USGS's underlying values for Swartz Creek: 0.039g peak ground acceleration, 0.08g at short period, 0.042g at 1 second. Within Michigan alone, Swartz Creek ranks 114 of 153 cities by seismic hazard - the 26th percentile in-state. Swartz Creek has a population of about 5,848.

Bracing and bolting: the actual cost

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 Swartz Creek 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 Swartz Creek's figures come from

Swartz Creek'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 Swartz Creek.