Sparks, NV: what USGS's seismic model says

USGS's ASCE 7-16 seismic design model - the same standard building codes use - places Sparks in Seismic Design Category D: High seismic hazard - this is the category most of coastal California, the Pacific Northwest, and other active fault regions fall into. Code mandates significant seismic detailing and restricts irregular structural configurations. This is the category the Brace + Bolt scope (cripple-wall bracing, foundation bolting) is built for. Nationally, Sparks ranks above 91% of the 4,875 cities in this dataset for seismic hazard - the 91th percentile.

Sparks by the numbers

USGS's underlying values for Sparks: 0.524g peak ground acceleration, 1.405g at short period, 0.489g at 1 second. Within Nevada alone, Sparks ranks 4 of 12 cities by seismic hazard - the 73th percentile in-state. Sparks has a population of about 111,520.

What a retrofit costs in Sparks

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 Nevada 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 Nevada.

What this means for insurance

A Sparks 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 Sparks's figures come from

Sparks's Category D 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 D does and doesn't tell you about Sparks.