St. Robert, MO: what USGS's seismic model says

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places St. Robert in Seismic Design Category C: Moderate seismic hazard. Code adds irregular-building restrictions and requires bracing of some nonstructural components (e.g. tall shelving, water heaters) in addition to structural detailing. Rank it against the rest of the country and St. Robert sits at the 72th percentile for seismic hazard among 4,875 US cities.

Where St. Robert sits in Missouri

USGS's underlying values for St. Robert: 0.121g peak ground acceleration, 0.248g at short period, 0.127g at 1 second. Within Missouri alone, St. Robert ranks 71 of 135 cities by seismic hazard - the 48th percentile in-state. St. Robert has a population of about 5,511.

Retrofit economics for St. Robert

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 St. Robert home

A St. Robert 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 St. Robert's figures come from

St. Robert's Category C 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 C does and doesn't tell you about St. Robert.