Sunnyside, WA: what USGS's seismic model says

Sunnyside carries Seismic Design Category D under USGS's ASCE 7-16 model. 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. That puts Sunnyside in the 81th percentile nationally for seismic hazard - higher than 81% of the 4,875 US cities USGS was checked against here.

How Sunnyside compares

USGS's underlying values for Sunnyside: 0.197g peak ground acceleration, 0.44g at short period, 0.175g at 1 second. Within Washington alone, Sunnyside ranks 101 of 125 cities by seismic hazard - the 19th percentile in-state. Sunnyside has a population of about 16,317.

What a retrofit costs in Sunnyside

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 Washington 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 Washington.

Earthquake insurance for a Sunnyside home

A Sunnyside 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 Sunnyside's figures come from

Sunnyside'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 Sunnyside.