Jackson, MS: what USGS's seismic model says

Under the seismic model IBC and ASCE 7 use for new construction, Jackson is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. That puts Jackson in the 43th percentile nationally for seismic hazard - higher than 43% of the 4,875 US cities USGS was checked against here.

Where Jackson sits in Mississippi

The raw figures: peak ground acceleration 0.067g, short-period spectral response 0.14g, 1-second spectral response 0.083g. Among 61 Mississippi cities in this dataset, Jackson ranks 36 for seismic hazard, the 42th percentile within the state. About 141,449 people live in Jackson, Mississippi.

What a retrofit costs in Jackson

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for Mississippi. A typical retrofit still runs $5,000-$10,000 nationally, about $7,000 for a common single-family job.

Earthquake insurance for a Jackson home

Outside California, earthquake coverage is typically sold as an endorsement added to a standard homeowners policy, not a separate product - worth asking about directly when getting a home-insurance quote for a Jackson address.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced Jackson's numbers. The guide to what a Seismic Design Category actually means covers why a category is never a substitute for an engineer's assessment of one specific house.