Does Vernal, UT need an earthquake retrofit?

Vernal 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. That puts Vernal in the 67th percentile nationally for seismic hazard - higher than 67% of the 4,875 US cities USGS was checked against here.

Vernal by the numbers

The raw figures: peak ground acceleration 0.189g, short-period spectral response 0.317g, 1-second spectral response 0.082g. Among 95 Utah cities in this dataset, Vernal ranks 94 for seismic hazard, the 1th percentile within the state. About 10,698 people live in Vernal, Utah.

Retrofit economics for Vernal

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

Earthquake insurance for a Vernal 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 Vernal address.

More on how this number was built

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