Gahanna, OH: what USGS's seismic model says

Gahanna 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 Gahanna in the 35th percentile nationally for seismic hazard - higher than 35% of the 4,875 US cities USGS was checked against here.

Gahanna by the numbers

The raw figures: peak ground acceleration 0.057g, short-period spectral response 0.115g, 1-second spectral response 0.059g. Among 254 Ohio cities in this dataset, Gahanna ranks 215 for seismic hazard, the 15th percentile within the state. About 35,544 people live in Gahanna, Ohio.

Retrofit economics for Gahanna

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 Gahanna address.

More on how this number was built

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