Rosenberg, TX: what USGS's seismic model says

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Rosenberg in Seismic Design Category A: Lowest seismic design category. Building code requires no seismic-specific detailing here beyond ordinary construction practice. Rank it against the rest of the country and Rosenberg sits at the 11th percentile for seismic hazard among 4,875 US cities.

How Rosenberg compares

The raw figures: peak ground acceleration 0.031g, short-period spectral response 0.064g, 1-second spectral response 0.037g. Among 384 Texas cities in this dataset, Rosenberg ranks 255 for seismic hazard, the 34th percentile within the state. About 42,571 people live in Rosenberg, Texas.

What a retrofit costs in Rosenberg

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

What this means for insurance

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 Rosenberg address.

More on how this number was built

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