Holly Springs, MS: what USGS's seismic model says

Holly Springs carries Seismic Design Category C under USGS's ASCE 7-16 model. 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 Holly Springs sits at the 79th percentile for seismic hazard among 4,875 US cities.

Where Holly Springs sits in Mississippi

The raw figures: peak ground acceleration 0.292g, short-period spectral response 0.54g, 1-second spectral response 0.215g. Among 61 Mississippi cities in this dataset, Holly Springs ranks 18 for seismic hazard, the 72th percentile within the state. About 6,472 people live in Holly Springs, Mississippi.

What a retrofit costs in Holly Springs

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.

What this means for insurance

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 Holly Springs address.

More on how this number was built

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