Muskogee's Seismic Design Category, explained

Under the seismic model IBC and ASCE 7 use for new construction, Muskogee is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Rank it against the rest of the country and Muskogee sits at the 44th percentile for seismic hazard among 4,875 US cities.

Muskogee by the numbers

USGS's underlying values for Muskogee: 0.069g peak ground acceleration, 0.143g at short period, 0.077g at 1 second. Within Oklahoma alone, Muskogee ranks 50 of 75 cities by seismic hazard - the 34th percentile in-state. Muskogee has a population of about 36,849.

Retrofit economics for Muskogee

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.

Insuring against this, not just retrofitting

A Muskogee 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 Muskogee's figures come from

Muskogee'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 Muskogee.