Harrison's Seismic Design Category, explained

Harrison 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. That puts Harrison in the 48th percentile nationally for seismic hazard - higher than 48% of the 4,875 US cities USGS was checked against here.

How Harrison compares

The raw figures: peak ground acceleration 0.074g, short-period spectral response 0.15g, 1-second spectral response 0.079g. Among 254 Ohio cities in this dataset, Harrison ranks 69 for seismic hazard, the 73th percentile within the state. About 13,526 people live in Harrison, Ohio.

What a retrofit costs in Harrison

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

More on how this number was built

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