Roselle, NJ: what USGS's seismic model says

Under the seismic model IBC and ASCE 7 use for new construction, Roselle is Category B. Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Nationally, Roselle ranks above 64% of the 4,875 cities in this dataset for seismic hazard - the 64th percentile.

Where Roselle sits in New Jersey

USGS's underlying values for Roselle: 0.171g peak ground acceleration, 0.279g at short period, 0.059g at 1 second. Within New Jersey alone, Roselle ranks 79 of 194 cities by seismic hazard - the 60th percentile in-state. Roselle has a population of about 23,064.

Retrofit economics for Roselle

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 New Jersey 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 New Jersey.

Insuring against this, not just retrofitting

A Roselle 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 Roselle's figures come from

Roselle'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 Roselle.