Harrisonville's Seismic Design Category, explained

Harrisonville carries Seismic Design Category B under USGS's ASCE 7-16 model. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, Harrisonville ranks above 29% of the 4,875 cities in this dataset for seismic hazard - the 29th percentile.

How Harrisonville compares

USGS's underlying values for Harrisonville: 0.049g peak ground acceleration, 0.104g at short period, 0.069g at 1 second. Within Missouri alone, Harrisonville ranks 107 of 135 cities by seismic hazard - the 21th percentile in-state. Harrisonville has a population of about 9,980.

What a retrofit costs in Harrisonville

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.

Earthquake insurance for a Harrisonville home

A Harrisonville 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 Harrisonville's figures come from

Harrisonville'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 Harrisonville.