Arden Hills, MN: what USGS's seismic model says

Under the seismic model IBC and ASCE 7 use for new construction, Arden Hills is Category A. Lowest seismic design category. Building code requires no seismic-specific detailing here beyond ordinary construction practice. That puts Arden Hills in the 3th percentile nationally for seismic hazard - higher than 3% of the 4,875 US cities USGS was checked against here.

Where Arden Hills sits in Minnesota

USGS's underlying values for Arden Hills: 0.022g peak ground acceleration, 0.047g at short period, 0.029g at 1 second. Within Minnesota alone, Arden Hills ranks 130 of 155 cities by seismic hazard - the 16th percentile in-state. Arden Hills has a population of about 9,490.

Retrofit economics for Arden Hills

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 Minnesota 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 Minnesota.

Insuring against this, not just retrofitting

A Arden Hills 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 Arden Hills's figures come from

Arden Hills'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 Arden Hills.