Marshfield, WI: what USGS's seismic model says

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Marshfield in Seismic Design Category A: Lowest seismic design category. Building code requires no seismic-specific detailing here beyond ordinary construction practice. Nationally, Marshfield ranks above 5% of the 4,875 cities in this dataset for seismic hazard - the 5th percentile.

Where Marshfield sits in Wisconsin

The raw figures: peak ground acceleration 0.023g, short-period spectral response 0.047g, 1-second spectral response 0.034g. Among 157 Wisconsin cities in this dataset, Marshfield ranks 135 for seismic hazard, the 14th percentile within the state. About 18,973 people live in Marshfield, Wisconsin.

Bracing and bolting: the actual cost

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for Wisconsin. A typical retrofit still runs $5,000-$10,000 nationally, about $7,000 for a common single-family job.

What this means for insurance

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 Marshfield address.

More on how this number was built

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