Sherwood, AR: what USGS's seismic model says

Under the seismic model IBC and ASCE 7 use for new construction, Sherwood is Category D. 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. Nationally, Sherwood ranks above 84% of the 4,875 cities in this dataset for seismic hazard - the 84th percentile.

How Sherwood compares

USGS's underlying values for Sherwood: 0.257g peak ground acceleration, 0.45g at short period, 0.161g at 1 second. Within Arkansas alone, Sherwood ranks 23 of 68 cities by seismic hazard - the 67th percentile in-state. Sherwood has a population of about 33,281.

Retrofit economics for Sherwood

A full earthquake retrofit typically runs $5,000-$10,000 nationally (around $7,000 typical), driven mainly by house size and foundation type, not by Arkansas specifically. California's Earthquake Brace + Bolt grant, which covers a large share of this cost, is a California-only program and does not apply in Arkansas.

Insuring against this, not just retrofitting

A Sherwood homeowner cannot buy a standalone earthquake policy in most cases - it is added to an existing homeowners policy as an endorsement, so the place to start is a regular home-insurance quote.

Where Sherwood's figures come from

Sherwood's Category D and every number above trace to USGS's own ASCE 7-16 Design Maps service - see the methodology guide. See the category explainer for what Category D does and doesn't tell you about Sherwood.