Guthrie's Seismic Design Category, explained

Guthrie 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. Nationally, Guthrie ranks above 60% of the 4,875 cities in this dataset for seismic hazard - the 60th percentile.

How Guthrie compares

USGS's underlying values for Guthrie: 0.127g peak ground acceleration, 0.226g at short period, 0.073g at 1 second. Within Oklahoma alone, Guthrie ranks 35 of 75 cities by seismic hazard - the 54th percentile in-state. Guthrie has a population of about 11,682.

Bracing and bolting: the actual cost

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 Oklahoma 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 Oklahoma.

What this means for insurance

A Guthrie 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 Guthrie's figures come from

Guthrie's Category B 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 B does and doesn't tell you about Guthrie.