Lake Havasu City, AZ: what USGS's seismic model says

Under the seismic model IBC and ASCE 7 use for new construction, Lake Havasu City is Category C. Moderate seismic hazard. Code adds irregular-building restrictions and requires bracing of some nonstructural components (e.g. tall shelving, water heaters) in addition to structural detailing. Nationally, Lake Havasu City ranks above 68% of the 4,875 cities in this dataset for seismic hazard - the 68th percentile.

How Lake Havasu City compares

The raw figures: peak ground acceleration 0.084g, short-period spectral response 0.186g, 1-second spectral response 0.111g. Among 57 Arizona cities in this dataset, Lake Havasu City ranks 19 for seismic hazard, the 68th percentile within the state. About 59,037 people live in Lake Havasu City, Arizona.

What a retrofit costs in Lake Havasu City

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 Lake Havasu City address.

More on how this number was built

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