Seymour's Seismic Design Category, explained

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Seymour in Seismic Design Category C: Moderate seismic hazard. Code adds irregular-building restrictions and requires bracing of some nonstructural components (e.g. tall shelving, water heaters) in addition to structural detailing. That puts Seymour in the 71th percentile nationally for seismic hazard - higher than 71% of the 4,875 US cities USGS was checked against here.

How Seymour compares

The raw figures: peak ground acceleration 0.109g, short-period spectral response 0.211g, 1-second spectral response 0.094g. Among 126 Indiana cities in this dataset, Seymour ranks 20 for seismic hazard, the 85th percentile within the state. About 22,524 people live in Seymour, Indiana.

Retrofit economics for Seymour

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

Earthquake insurance for a Seymour 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 Seymour address.

More on how this number was built

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