The Earth Movement Exclusion
In the world of property insurance, standard homeowners forms (such as the HO-2, HO-3, and HO-5) specifically exclude losses caused by earth movement. This exclusion is broad and encompasses earthquakes, landslides, mudflows, and even sinkholes (unless state-specific endorsements for sinkholes are present). Because these events have the potential for catastrophic, widespread loss, they are not priced into the base premium of a standard policy.
For a homeowner to protect their dwelling and personal property against seismic activity, they must either purchase a separate earthquake policy or add an Earthquake Endorsement to their existing homeowners policy. For the licensing exam, it is critical to understand that this endorsement modifies the policy to include tremors and earth shocks as covered perils. You can find more foundational information in our complete Homeowners exam guide.
The 72-Hour Occurrence Rule
A common exam question involves the definition of an "occurrence" regarding earthquakes. Under the earthquake endorsement, all earth movements (shocks, tremors, or aftershocks) that occur within a 72-hour period are considered a single occurrence. This means the insured only pays one deductible for multiple tremors happening within that three-day window.
Coverage Limits and Exclusions
While the earthquake endorsement adds coverage for the shaking of the earth, it does not provide a "blanket" coverage for every disaster related to a seismic event. It is essential to distinguish between the cause of loss and the resulting damage:
- Covered: Damage to the dwelling, other structures, and personal property directly caused by the earth shaking.
- Excluded: Damage caused by flood, even if the flood was triggered by an earthquake (such as a tsunami). Flood is always a separate exclusion requiring its own policy.
- Excluded: Damage to exterior masonry veneer (brick or stone faces). While the structure itself is covered, many endorsements exclude the decorative "skin" of the building unless specifically added for an extra premium.
One exception to the exclusion rule is fire or explosion. If an earthquake causes a gas line to rupture and the house burns down, the standard homeowners policy will cover the fire damage under the fire peril, even if the insured does not have an earthquake endorsement. However, the earthquake endorsement is needed to cover the structural collapse that occurred before the fire started.
Standard vs. Earthquake Deductibles
| Feature | Standard HO Policy | Earthquake Endorsement |
|---|---|---|
| Deductible Type | Flat Dollar Amount | Percentage of Limit |
| Typical Range | $500 - $2,500 | 5% - 25% |
| Application | Per Claim | Per Coverage (A and C) |
| Basis | Fixed amount regardless of value | Percentage of the Total Insurance Limit |
Calculating the Percentage Deductible
The most distinctive feature of earthquake coverage is the percentage deductible. Unlike a standard $1,000 deductible, an earthquake deductible is calculated as a percentage of the limit of insurance for the specific coverage being claimed. This is a frequent calculation required on practice Homeowners questions.
For example, if a home is insured for $300,000 (Coverage A) and the earthquake endorsement has a 15% deductible, the insured is responsible for the first $45,000 of the loss. If the personal property (Coverage C) is insured for $150,000, a separate 15% deductible ($22,500) typically applies to personal property claims. This high out-of-pocket cost is designed to keep earthquake insurance available and solvent for carriers in high-risk zones.