Earthquake coverage · Seismic risk
Every standard homeowners policy excludes earthquake damage. Here's what that actually means for you.
Earth movement is a named exclusion in virtually every standard homeowners policy — not fine print, but a fundamental coverage gap. For homeowners in seismically active areas, the decision to add earthquake coverage is one of the most consequential insurance decisions they'll make.
Understand your earthquake exposureWhat the exclusion actually means
- Earth movement is explicitly excluded. Standard HO-3 policies list "earth movement" as a named exclusion — this covers earthquakes, tremors, aftershocks, landslides, soil liquefaction, and sinkholes. If the ground moved and caused the damage, your standard policy does not respond.
- Fire following earthquake is typically covered. The one exception: if an earthquake causes a gas line to break and a fire to start, the fire damage is usually covered under the standard policy's fire coverage. The shaking damage itself is not.
- This is a nationwide issue, not just California. The Pacific Northwest (Washington, Oregon) sits on the Cascadia Subduction Zone — capable of producing a magnitude 9.0+ earthquake. The New Madrid Seismic Zone affects parts of Missouri, Arkansas, Tennessee, and Kentucky. Utah, Nevada, and parts of the Mountain West carry significant seismic risk. This is not a California-only problem.
- The deductible structure is different from home insurance. Earthquake policies use a percentage deductible — typically 10–25% of the insured dwelling value — rather than a flat dollar deductible. On a $1M home with a 15% deductible, the first $150,000 of damage is yours. Understanding this before buying is essential.
The Cascadia Subduction Zone
M9.0+
The Cascadia Subduction Zone, running from Northern California through Washington State, is capable of producing a magnitude 9.0 or greater earthquake — the most powerful type of seismic event.
~13%
estimated probability of a major Cascadia earthquake in the next 50 years, according to USGS seismic hazard research.
- The last major Cascadia event was in 1700. Geological evidence shows a magnitude 9.0 earthquake struck the Pacific Northwest in January 1700. The recurrence interval for such events is estimated at 200–500 years — placing the region within the historical window for a repeat.
- Soft soils amplify shaking. Areas built on fill, alluvial soils, or near water bodies experience significantly more intense shaking than bedrock sites. Soil liquefaction — where saturated soil behaves like liquid during shaking — causes catastrophic foundation damage that is also excluded from standard policies.
- Modern building codes reduce but don't eliminate risk. Buildings constructed after current seismic codes are more resilient — but even code-compliant structures can experience significant damage in a major earthquake. Pre-1980 construction in particular carries elevated risk.
How earthquake insurance works
- Dwelling coverage pays to repair or rebuild the structure. The core coverage — funds to repair earthquake-caused structural damage, including foundation cracking, wall collapse, and structural failure. Insured at the same replacement cost basis as your homeowners policy dwelling limit.
- Personal property coverage replaces damaged contents. Furniture, electronics, and personal belongings damaged by earthquake shaking. Contents coverage under earthquake policies typically has its own sublimit and deductible.
- Additional living expenses cover displacement. If your home is uninhabitable after an earthquake, ALE coverage pays for hotel, rental housing, and increased living costs during the repair period — which can run months or years after a major event.
- Loss assessment coverage for condo owners. Condo owners face a specific risk: their HOA's earthquake policy may be inadequate, and a special assessment to cover the shortfall becomes a personal liability. Loss assessment coverage addresses this.
Frequently asked questions
Is earthquake insurance worth it?
The answer depends on your specific risk factors: your location and soil type, your home's construction and age, your equity position, your financial reserves, and your mortgage situation. For a homeowner with significant equity in a wood-frame house on stable soil in a moderate-risk area, it's a genuine cost-benefit decision. For a homeowner with limited reserves in a soft-story building near a fault, the calculus is more compelling. We help clients think through this without pressure to purchase.
What does an earthquake deductible look like in practice?
Earthquake deductibles are expressed as a percentage of your dwelling coverage limit. If your home is insured for $800,000 and your deductible is 15%, the first $120,000 of earthquake damage is your responsibility before the policy pays anything. This means earthquake insurance is most valuable for major events — not minor damage. Many homeowners choose to self-insure minor earthquake losses and carry earthquake insurance only for catastrophic scenarios.
Can I get earthquake insurance if my home is older?
Generally yes, though older homes — particularly unreinforced masonry, soft-story construction, or homes with post-and-pier foundations — may face higher premiums, higher deductibles, or coverage limitations. Some carriers will require a seismic retrofit before writing coverage. An independent broker can identify carriers with the most favorable underwriting for older construction.
Does renters insurance cover earthquake damage to my belongings?
Standard renters insurance excludes earthquake damage to personal property, just as homeowners policies do. Standalone earthquake coverage for renters — covering personal property and additional living expenses — is available and typically quite affordable.
Understand your earthquake exposure before it becomes relevant.
We'll review your home's specific risk profile — construction, soil, location — and give you an honest picture of whether earthquake coverage makes sense for you.
Request a free risk reviewNo obligation · We respond within 24 hours · Licensed in Washington & Idaho