Springfield, MO: what USGS's seismic model says

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Springfield 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. Nationally, Springfield ranks above 68% of the 4,875 cities in this dataset for seismic hazard - the 68th percentile.

Where Springfield sits in Missouri

The raw figures: peak ground acceleration 0.09g, short-period spectral response 0.188g, 1-second spectral response 0.105g. Among 135 Missouri cities in this dataset, Springfield ranks 80 for seismic hazard, the 41th percentile within the state. About 170,596 people live in Springfield, Missouri.

What a retrofit costs in Springfield

Outside California, no state-level retrofit grant equivalent to Brace + Bolt could be found for Missouri. 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 Springfield address.

More on how this number was built

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