Rockton, IL: what USGS's seismic model says

Rockton 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. Nationally, Rockton ranks above 30% of the 4,875 cities in this dataset for seismic hazard - the 30th percentile.

Rockton by the numbers

The raw figures: peak ground acceleration 0.05g, short-period spectral response 0.099g, 1-second spectral response 0.056g. Among 330 Illinois cities in this dataset, Rockton ranks 316 for seismic hazard, the 4th percentile within the state. About 7,861 people live in Rockton, Illinois.

What a retrofit costs in Rockton

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

Earthquake insurance for a Rockton 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 Rockton address.

More on how this number was built

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