LOS ANGELES · CALIFORNIA · USA · SEISMIC RISK INTELLIGENCE

Property Risk in Los Angeles
San Andreas & Beyond

LA sits on the world's most studied earthquake system. The Big One — a M7.8 San Andreas event — has a 60% probability within 30 years. ShakeOut modeling predicts $213B in damage. Building era, soil type, and fault proximity determine your specific risk.

⚡ VERY HIGH SEISMIC · SAN ANDREAS · M7.8+ CAPABLE
M8.0+
San Andreas capable
60%
Probability M7.5+ within 30 yrs
$213B
ShakeOut M7.8 damage estimate

Los Angeles Seismic Profile

D
VERY HIGH — USGS Seismic Hazard Zone D
USGS / CGS / California Building Code
LIVE API
Primary faultSan Andreas Fault — M8.0+ capable
Secondary faultsHollywood · Puente Hills · Newport-Inglewood · Sierra Madre
Last major eventNorthridge 1994 — M6.7 · $40B damage · 57 deaths
Alquist-Priolo ZoneDisclosure required within 50ft of active fault trace
Soft-story retrofitLA Ordinance 183893 — mandatory for wood-frame buildings
Flood riskLow (most areas) · FEMA Zone X · Exception: river corridors

LA Neighborhoods — Seismic Risk by Area

Hollywood Hills
Very High
On/near Hollywood Fault. Hillside = landslide risk. Pre-1940 unreinforced masonry. Alquist-Priolo in some areas.
West Hollywood
Very High
High density of soft-story apartments. Mandatory retrofit program. Check compliance status before buying.
Koreatown / Mid-City
Very High
Soft soils amplify shaking. Many pre-1980 non-ductile concrete buildings. High retrofit backlog.
Beverly Hills / Bel Air
High
Hillside properties: landslide risk. Newer construction better compliant. Higher base prices.
Downtown LA
Very High
Mix of modern high-rises (well-designed) and older mid-rises. Puente Hills Fault nearby.
Santa Monica
High
Coastal soft soils. Santa Monica Fault. Post-1994 rebuilt housing stock better compliance.
Pasadena / San Gabriel
High
Near Sierra Madre Fault. 1971 Sylmar M6.6 and 1994 Northridge both severely impacted valley areas.
Torrance / South Bay
High
Newport-Inglewood Fault zone. Palos Verdes Hills — landslide active zone (ongoing PV Drive closures).
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FAQ — Earthquake Risk in Los Angeles

LA has very high seismic risk. The San Andreas Fault is capable of M8.0+. Multiple secondary faults — Hollywood, Puente Hills, Newport-Inglewood — run through the metropolitan area. USGS ShakeOut scenario for M7.8 predicts 1,800 deaths and $213B in damage. Northridge 1994 (M6.7, $40B) remains the most recent major event.
Pre-1980 soft-story wood-frame apartments (West Hollywood, Koreatown, Silver Lake) are highest risk. Non-ductile concrete buildings built before 1980 are the second-highest category. LA has mandatory retrofit ordinances — always check if a pre-1980 building has completed its required retrofit before purchasing.
California's Alquist-Priolo Act requires sellers to disclose if a property is in a mapped Earthquake Fault Zone — generally within 50 feet of an active fault trace. New construction is prohibited in these zones. Disclosure is mandatory. However, the 50-foot zone covers only surface rupture risk — most earthquake damage is from ground shaking, which affects much wider areas.
LA remains one of the world's most desirable real estate markets. The earthquake risk is real and priced in — but properly constructed and retrofitted post-1994 buildings are significantly safer. Key due diligence: check building year, retrofit status, soil type, and distance to active faults. Earthquake insurance is available (though expensive) through the California Earthquake Authority.

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