Greenfield's Seismic Design Category, explained

Greenfield 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. That puts Greenfield in the 53th percentile nationally for seismic hazard - higher than 53% of the 4,875 US cities USGS was checked against here.

Where Greenfield sits in Indiana

USGS's underlying values for Greenfield: 0.088g peak ground acceleration, 0.172g at short period, 0.081g at 1 second. Within Indiana alone, Greenfield ranks 46 of 126 cities by seismic hazard - the 64th percentile in-state. Greenfield has a population of about 26,268.

What a retrofit costs in Greenfield

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 Indiana 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 Indiana.

Insuring against this, not just retrofitting

A Greenfield 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 Greenfield's figures come from

Greenfield'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 Greenfield.