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🌋 '''Earthquake''' in insurance refers to the sudden release of energy in the earth's crust that generates seismic waves, causing ground shaking that can damage or destroy insured structures, infrastructure, and personal property. As a [[Definition:Peril | peril]], earthquake is one of the most significant [[Definition:Catastrophe risk | catastrophe risks]] that [[Definition:Insurance carrier | insurers]] and [[Definition:Reinsurance | reinsurers]] must evaluate, price, and manage — particularly in seismically active regions such as California, Japan, Turkey, Chile, and New Zealand. Because earthquake losses can be enormous and highly concentrated geographically, they have historically driven some of the largest [[Definition:Insured loss | insured loss]] events on record.

📐 Most standard [[Definition:Property insurance | property insurance]] policies exclude earthquake damage through the [[Definition:Earth movement exclusion | earth movement exclusion]], so coverage is typically obtained through standalone [[Definition:Earthquake insurance | earthquake policies]] or specialized [[Definition:Endorsement | endorsements]]. [[Definition:Underwriting | Underwriters]] price earthquake risk by examining building construction type, soil conditions, proximity to known fault lines, local building codes, and the insured's chosen [[Definition:Deductible | deductible]] — which for earthquake coverage is often a percentage of the insured value (commonly 10–25%) rather than a flat dollar amount. [[Definition:Catastrophe model | Catastrophe models]] from vendors such as [[Definition:Risk Management Solutions (RMS) | RMS]], [[Definition:AIR Worldwide | AIR Worldwide]], and CoreLogic play a central role in estimating [[Definition:Probable maximum loss (PML) | probable maximum loss]] and structuring [[Definition:Reinsurance program | reinsurance programs]] that protect carriers against tail-risk scenarios.

🏗️ Managing earthquake exposure shapes decisions across the entire insurance value chain. [[Definition:Primary insurer | Primary insurers]] must balance the need to write business in quake-prone territories against the concentration risk that a single event could overwhelm their [[Definition:Surplus | surplus]]. [[Definition:Reinsurance | Reinsurers]] and [[Definition:Insurance-linked securities (ILS) | ILS]] investors absorb much of this peak exposure through [[Definition:Catastrophe bond | catastrophe bonds]], [[Definition:Industry loss warranty (ILW) | industry loss warranties]], and traditional [[Definition:Excess of loss reinsurance | excess-of-loss treaties]]. Government-backed mechanisms — such as the [[Definition:California Earthquake Authority (CEA) | California Earthquake Authority]] and Japan's earthquake reinsurance scheme — exist precisely because private markets alone may not provide sufficient [[Definition:Capacity | capacity]] at affordable prices. For [[Definition:Risk management | risk managers]] and [[Definition:Insurance broker | brokers]], earthquake remains a peril where the gap between economic and insured losses is persistently wide, underscoring the ongoing challenge of closing the [[Definition:Protection gap | protection gap]].

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Earthquake risk]]
* [[Definition:Earthquake insurance]]
* [[Definition:Catastrophe model]]
* [[Definition:Probable maximum loss (PML)]]
* [[Definition:California Earthquake Authority (CEA)]]
* [[Definition:Protection gap]]
{{Div col end}}

Definition:Earthquake - Revision history

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