Does Millersville, PA need an earthquake retrofit?

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Millersville in Seismic Design Category B: Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Rank it against the rest of the country and Millersville sits at the 57th percentile for seismic hazard among 4,875 US cities.

How Millersville compares

The raw figures: peak ground acceleration 0.105g, short-period spectral response 0.187g, 1-second spectral response 0.047g. Among 193 Pennsylvania cities in this dataset, Millersville ranks 12 for seismic hazard, the 94th percentile within the state. About 9,290 people live in Millersville, Pennsylvania.

What a retrofit costs in Millersville

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 Millersville 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 Millersville address.

More on how this number was built

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