Mansfield, OH: what USGS's seismic model says

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Mansfield in Seismic Design Category B: Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, Mansfield ranks above 37% of the 4,875 cities in this dataset for seismic hazard - the 37th percentile.

Where Mansfield sits in Ohio

USGS's underlying values for Mansfield: 0.06g peak ground acceleration, 0.119g at short period, 0.053g at 1 second. Within Ohio alone, Mansfield ranks 197 of 254 cities by seismic hazard - the 23th percentile in-state. Mansfield has a population of about 47,593.

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 Ohio 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 Ohio.

Insuring against this, not just retrofitting

A Mansfield 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 Mansfield's figures come from

Mansfield'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 Mansfield.