Does Omaha, NE need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, Omaha is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Rank it against the rest of the country and Omaha sits at the 18th percentile for seismic hazard among 4,875 US cities.

Omaha by the numbers

The raw figures: peak ground acceleration 0.035g, short-period spectral response 0.073g, 1-second spectral response 0.045g. Among 32 Nebraska cities in this dataset, Omaha ranks 17 for seismic hazard, the 48th percentile within the state. About 489,265 people live in Omaha, Nebraska.

Retrofit economics for Omaha

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.

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 Omaha address.

More on how this number was built

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