Does Belen, NM need an earthquake retrofit?

Under the seismic model IBC and ASCE 7 use for new construction, Belen 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. Rank it against the rest of the country and Belen sits at the 76th percentile for seismic hazard among 4,875 US cities.

How Belen compares

The raw figures: peak ground acceleration 0.18g, short-period spectral response 0.404g, 1-second spectral response 0.124g. Among 35 New Mexico cities in this dataset, Belen ranks 10 for seismic hazard, the 74th percentile within the state. About 7,556 people live in Belen, New Mexico.

Retrofit economics for Belen

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for New Mexico. 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 Belen address.

More on how this number was built

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