Lyman, SC: what USGS's seismic model says

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Lyman 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. Nationally, Lyman ranks above 75% of the 4,875 cities in this dataset for seismic hazard - the 75th percentile.

Where Lyman sits in South Carolina

The raw figures: peak ground acceleration 0.158g, short-period spectral response 0.279g, 1-second spectral response 0.092g. Among 66 South Carolina cities in this dataset, Lyman ranks 49 for seismic hazard, the 26th percentile within the state. About 6,939 people live in Lyman, South Carolina.

Retrofit economics for Lyman

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for South Carolina. 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 Lyman address.

More on how this number was built

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