Harrison, WI: what USGS's seismic model says

Harrison carries Seismic Design Category A under USGS's ASCE 7-16 model. Lowest seismic design category. Building code requires no seismic-specific detailing here beyond ordinary construction practice. That puts Harrison in the 8th percentile nationally for seismic hazard - higher than 8% of the 4,875 US cities USGS was checked against here.

Where Harrison sits in Wisconsin

USGS's underlying values for Harrison: 0.026g peak ground acceleration, 0.054g at short period, 0.038g at 1 second. Within Wisconsin alone, Harrison ranks 108 of 157 cities by seismic hazard - the 31th percentile in-state. Harrison has a population of about 14,254.

Retrofit economics for Harrison

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 Wisconsin 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 Wisconsin.

What this means for insurance

A Harrison 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 Harrison's figures come from

Harrison's Category A 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 A does and doesn't tell you about Harrison.