Altoona, PA: what USGS's seismic model says

Altoona 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. Rank it against the rest of the country and Altoona sits at the 14th percentile for seismic hazard among 4,875 US cities.

Where Altoona sits in Pennsylvania

The raw figures: peak ground acceleration 0.044g, short-period spectral response 0.092g, 1-second spectral response 0.039g. Among 193 Pennsylvania cities in this dataset, Altoona ranks 187 for seismic hazard, the 3th percentile within the state. About 42,719 people live in Altoona, Pennsylvania.

Bracing and bolting: the actual cost

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

Earthquake insurance for a Altoona home

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 Altoona address.

More on how this number was built

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