Harrisonburg's Seismic Design Category, explained

Harrisonburg carries Seismic Design Category B under USGS's ASCE 7-16 model. 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 Harrisonburg sits at the 47th percentile for seismic hazard among 4,875 US cities.

Harrisonburg by the numbers

The raw figures: peak ground acceleration 0.072g, short-period spectral response 0.138g, 1-second spectral response 0.052g. Among 63 Virginia cities in this dataset, Harrisonburg ranks 37 for seismic hazard, the 42th percentile within the state. About 51,164 people live in Harrisonburg, Virginia.

Bracing and bolting: the actual cost

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

More on how this number was built

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