Plymouth, IN: what USGS's seismic model says

Plymouth 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 Plymouth sits at the 31th percentile for seismic hazard among 4,875 US cities.

Where Plymouth sits in Indiana

The raw figures: peak ground acceleration 0.053g, short-period spectral response 0.11g, 1-second spectral response 0.065g. Among 126 Indiana cities in this dataset, Plymouth ranks 122 for seismic hazard, the 3th percentile within the state. About 11,042 people live in Plymouth, Indiana.

What a retrofit costs in Plymouth

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.

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 Plymouth address.

More on how this number was built

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