Atchison, KS: what USGS's seismic model says

Atchison 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. Nationally, Atchison ranks above 24% of the 4,875 cities in this dataset for seismic hazard - the 24th percentile.

How Atchison compares

The raw figures: peak ground acceleration 0.043g, short-period spectral response 0.089g, 1-second spectral response 0.061g. Among 63 Kansas cities in this dataset, Atchison ranks 41 for seismic hazard, the 35th percentile within the state. About 10,813 people live in Atchison, Kansas.

Retrofit economics for Atchison

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

More on how this number was built

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