Ludington's Seismic Design Category, explained

Ludington carries Seismic Design Category A under USGS's ASCE 7-16 model. Lowest seismic design category. Building code requires no seismic-specific detailing here beyond ordinary construction practice. That puts Ludington in the 9th percentile nationally for seismic hazard - higher than 9% of the 4,875 US cities USGS was checked against here.

Ludington by the numbers

USGS's underlying values for Ludington: 0.027g peak ground acceleration, 0.057g at short period, 0.039g at 1 second. Within Michigan alone, Ludington ranks 140 of 153 cities by seismic hazard - the 9th percentile in-state. Ludington has a population of about 7,577.

Retrofit economics for Ludington

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 Michigan 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 Michigan.

Earthquake insurance for a Ludington home

A Ludington 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 Ludington's figures come from

Ludington's Category A 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 A does and doesn't tell you about Ludington.