Clarksdale, MS: what USGS's seismic model says

Clarksdale 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. Nationally, Clarksdale ranks above 82% of the 4,875 cities in this dataset for seismic hazard - the 82th percentile.

Where Clarksdale sits in Mississippi

USGS's underlying values for Clarksdale: 0.221g peak ground acceleration, 0.419g at short period, 0.176g at 1 second. Within Mississippi alone, Clarksdale ranks 8 of 61 cities by seismic hazard - the 88th percentile in-state. Clarksdale has a population of about 13,861.

What a retrofit costs in Clarksdale

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 Mississippi 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 Mississippi.

Insuring against this, not just retrofitting

A Clarksdale 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 Clarksdale's figures come from

Clarksdale'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 Clarksdale.