Marana, AZ: what USGS's seismic model says

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

Marana by the numbers

The raw figures: peak ground acceleration 0.118g, short-period spectral response 0.267g, 1-second spectral response 0.082g. Among 57 Arizona cities in this dataset, Marana ranks 21 for seismic hazard, the 64th percentile within the state. About 62,380 people live in Marana, Arizona.

Retrofit economics for Marana

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.

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 Marana address.

More on how this number was built

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