Clive's Seismic Design Category, explained

Clive 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. That puts Clive in the 16th percentile nationally for seismic hazard - higher than 16% of the 4,875 US cities USGS was checked against here.

Clive by the numbers

The raw figures: peak ground acceleration 0.029g, short-period spectral response 0.061g, 1-second spectral response 0.051g. Among 85 Iowa cities in this dataset, Clive ranks 52 for seismic hazard, the 39th percentile within the state. About 19,508 people live in Clive, Iowa.

What a retrofit costs in Clive

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

Earthquake insurance for a Clive 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 Clive address.

More on how this number was built

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