Portales's Seismic Design Category, explained

Portales carries Seismic Design Category A under USGS's ASCE 7-16 model. Lowest seismic design category. Building code requires no seismic-specific detailing here beyond ordinary construction practice. Nationally, Portales ranks above 13% of the 4,875 cities in this dataset for seismic hazard - the 13th percentile.

How Portales compares

The raw figures: peak ground acceleration 0.037g, short-period spectral response 0.079g, 1-second spectral response 0.032g. Among 35 New Mexico cities in this dataset, Portales ranks 34 for seismic hazard, the 3th percentile within the state. About 11,789 people live in Portales, New Mexico.

What a retrofit costs in Portales

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 Portales address.

More on how this number was built

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