Chillicothe's Seismic Design Category, explained

Under the seismic model IBC and ASCE 7 use for new construction, Chillicothe is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Chillicothe in the 24th percentile nationally for seismic hazard - higher than 24% of the 4,875 US cities USGS was checked against here.

How Chillicothe compares

USGS's underlying values for Chillicothe: 0.043g peak ground acceleration, 0.092g at short period, 0.067g at 1 second. Within Missouri alone, Chillicothe ranks 130 of 135 cities by seismic hazard - the 4th percentile in-state. Chillicothe has a population of about 9,103.

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 Missouri 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 Missouri.

Insuring against this, not just retrofitting

A Chillicothe 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 Chillicothe's figures come from

Chillicothe'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 Chillicothe.