Tucson, AZ: what USGS's seismic model says

Tucson 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, Tucson ranks above 59% of the 4,875 cities in this dataset for seismic hazard - the 59th percentile.

Where Tucson sits in Arizona

The raw figures: peak ground acceleration 0.118g, short-period spectral response 0.266g, 1-second spectral response 0.082g. Among 57 Arizona cities in this dataset, Tucson ranks 20 for seismic hazard, the 66th percentile within the state. About 554,013 people live in Tucson, Arizona.

What a retrofit costs in Tucson

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

Earthquake insurance for a Tucson 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 Tucson address.

More on how this number was built

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