Perth Amboy's Seismic Design Category, explained

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Perth Amboy in Seismic Design Category B: Low seismic hazard. Code requires basic seismic detailing (bracing, connections) but no special structural system restrictions. Rank it against the rest of the country and Perth Amboy sits at the 63th percentile for seismic hazard among 4,875 US cities.

Perth Amboy by the numbers

USGS's underlying values for Perth Amboy: 0.164g peak ground acceleration, 0.27g at short period, 0.057g at 1 second. Within New Jersey alone, Perth Amboy ranks 99 of 194 cities by seismic hazard - the 49th percentile in-state. Perth Amboy has a population of about 56,939.

Bracing and bolting: the actual cost

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.

Earthquake insurance for a Perth Amboy home

A Perth Amboy 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 Perth Amboy's figures come from

Perth Amboy'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 Perth Amboy.