Long Grove, IL: what USGS's seismic model says

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Long Grove in Seismic Design Category B: 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 Long Grove sits at the 34th percentile for seismic hazard among 4,875 US cities.

Where Long Grove sits in Illinois

The raw figures: peak ground acceleration 0.056g, short-period spectral response 0.111g, 1-second spectral response 0.059g. Among 330 Illinois cities in this dataset, Long Grove ranks 274 for seismic hazard, the 17th percentile within the state. About 8,393 people live in Long Grove, Illinois.

Retrofit economics for Long Grove

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 Long Grove 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 Long Grove address.

More on how this number was built

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