Does Flowood, MS need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Flowood 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 Flowood sits at the 67th percentile for seismic hazard among 4,875 US cities.

Flowood by the numbers

USGS's underlying values for Flowood: 0.068g peak ground acceleration, 0.142g at short period, 0.084g at 1 second. Within Mississippi alone, Flowood ranks 35 of 61 cities by seismic hazard - the 43th percentile in-state. Flowood has a population of about 10,853.

Retrofit economics for Flowood

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 Mississippi 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 Mississippi.

Insuring against this, not just retrofitting

A Flowood 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 Flowood's figures come from

Flowood'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 Flowood.