Richmond's Seismic Design Category, explained

USGS's ASCE 7-16 seismic model can't even fit Richmond onto its standard code table - ground motion here (peak ground acceleration 0.846g) is past what the table covers, which under §11.4.8 means a site-specific geotechnical study, not a standard letter grade. Nationally, Richmond ranks above 99% of the 4,875 cities in this dataset for seismic hazard - the 99th percentile.

Where Richmond sits in California

USGS's underlying values for Richmond: 0.846g peak ground acceleration, 2.013g at short period, 0.772g at 1 second. Within California alone, Richmond ranks 63 of 429 cities by seismic hazard - the 86th percentile in-state. Richmond has a population of about 115,353.

Retrofit economics for Richmond

Cripple-wall bracing and foundation bolting - the scope California's Earthquake Brace + Bolt (EBB) grant funds - typically runs $3,000-$7,000 nationally. Every qualifying household gets a $3,000 base grant, which brings that down to $0-$4,000 out of pocket; income-eligible households ($89,040/year or under) can get up to $10,000 total, covering the retrofit outright in most cases.

Insuring against this, not just retrofitting

Richmond sits in CEA territory, but CEA earthquake coverage is agent-sold only, never direct - so the real first step for a homeowner here is a standard home-insurance quote, then asking that agent about CEA specifically.

Where Richmond's figures come from

Richmond's Category rating and every number above trace to USGS's own ASCE 7-16 Design Maps service - see the methodology guide. Full Brace + Bolt eligibility rules - beyond what this page can check from a ZIP code alone - are in the retrofit cost and grant guide.