Does Ripon, WI need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Ripon in Seismic Design Category A: Lowest seismic design category. Building code requires no seismic-specific detailing here beyond ordinary construction practice. Rank it against the rest of the country and Ripon sits at the 10th percentile for seismic hazard among 4,875 US cities.

Ripon by the numbers

USGS's underlying values for Ripon: 0.028g peak ground acceleration, 0.059g at short period, 0.041g at 1 second. Within Wisconsin alone, Ripon ranks 101 of 157 cities by seismic hazard - the 36th percentile in-state. Ripon has a population of about 7,716.

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 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.

Earthquake insurance for a Ripon home

A Ripon 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 Ripon's figures come from

Ripon'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 Ripon.