Grand Island, NE: what USGS's seismic model says

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Grand Island in Seismic Design Category A: Lowest seismic design category. Building code requires no seismic-specific detailing here beyond ordinary construction practice. That puts Grand Island in the 14th percentile nationally for seismic hazard - higher than 14% of the 4,875 US cities USGS was checked against here.

Where Grand Island sits in Nebraska

The raw figures: peak ground acceleration 0.042g, short-period spectral response 0.086g, 1-second spectral response 0.041g. Among 32 Nebraska cities in this dataset, Grand Island ranks 24 for seismic hazard, the 26th percentile within the state. About 53,250 people live in Grand Island, 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.

Earthquake insurance for a Grand Island home

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 Grand Island address.

More on how this number was built

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