Ardmore's Seismic Design Category, explained

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Ardmore in Seismic Design Category B: Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, Ardmore ranks above 61% of the 4,875 cities in this dataset for seismic hazard - the 61th percentile.

How Ardmore compares

USGS's underlying values for Ardmore: 0.143g peak ground acceleration, 0.249g at short period, 0.075g at 1 second. Within Oklahoma alone, Ardmore ranks 29 of 75 cities by seismic hazard - the 62th percentile in-state. Ardmore has a population of about 25,064.

What a retrofit costs in Ardmore

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 Ardmore 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 Ardmore's figures come from

Ardmore'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 Ardmore.