North Platte's Seismic Design Category, explained

Under the seismic model IBC and ASCE 7 use for new construction, North Platte is Category A. Lowest seismic design category. Building code requires no seismic-specific detailing here beyond ordinary construction practice. That puts North Platte in the 13th percentile nationally for seismic hazard - higher than 13% of the 4,875 US cities USGS was checked against here.

How North Platte compares

The raw figures: peak ground acceleration 0.037g, short-period spectral response 0.078g, 1-second spectral response 0.032g. Among 32 Nebraska cities in this dataset, North Platte ranks 32 for seismic hazard, the 0th percentile within the state. About 22,549 people live in North Platte, Nebraska.

Bracing and bolting: the actual cost

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

Insuring against this, not just retrofitting

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 North Platte address.

More on how this number was built

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