Natchitoches, LA: what USGS's seismic model says

Natchitoches 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, Natchitoches ranks above 29% of the 4,875 cities in this dataset for seismic hazard - the 29th percentile.

Natchitoches by the numbers

USGS's underlying values for Natchitoches: 0.048g peak ground acceleration, 0.099g at short period, 0.063g at 1 second. Within Louisiana alone, Natchitoches ranks 10 of 59 cities by seismic hazard - the 84th percentile in-state. Natchitoches has a population of about 17,165.

Retrofit economics for Natchitoches

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 Louisiana 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 Louisiana.

Earthquake insurance for a Natchitoches home

A Natchitoches 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 Natchitoches's figures come from

Natchitoches'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 Natchitoches.