Does Osceola, AR need an earthquake retrofit?

Osceola carries Seismic Design Category D under USGS's ASCE 7-16 model. High seismic hazard - this is the category most of coastal California, the Pacific Northwest, and other active fault regions fall into. Code mandates significant seismic detailing and restricts irregular structural configurations. This is the category the Brace + Bolt scope (cripple-wall bracing, foundation bolting) is built for. That puts Osceola in the 98th percentile nationally for seismic hazard - higher than 98% of the 4,875 US cities USGS was checked against here.

Where Osceola sits in Arkansas

The raw figures: peak ground acceleration 1.366g, short-period spectral response 2.089g, 1-second spectral response 0.727g. Among 68 Arkansas cities in this dataset, Osceola ranks 2 for seismic hazard, the 99th percentile within the state. About 6,496 people live in Osceola, Arkansas.

Bracing and bolting: the actual cost

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

Earthquake insurance for a Osceola 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 Osceola address.

More on how this number was built

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