Richland's Seismic Design Category, explained

Richland 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. That puts Richland in the 41th percentile nationally for seismic hazard - higher than 41% of the 4,875 US cities USGS was checked against here.

Where Richland sits in Mississippi

The raw figures: peak ground acceleration 0.065g, short-period spectral response 0.136g, 1-second spectral response 0.081g. Among 61 Mississippi cities in this dataset, Richland ranks 40 for seismic hazard, the 35th percentile within the state. About 7,607 people live in Richland, Mississippi.

Retrofit economics for Richland

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 Richland 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 Richland address.

More on how this number was built

The methodology guide covers exactly how USGS's public design-maps API produced Richland'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.