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← GeographyWhich process most directly triggers undersea landslides after large earthquakes?
A)Seismic ground motion liquefaction✓
B)Decreased sediment overburden pressure
C)Tectonic plate uplift rebound
D)Tsunami-induced sediment redeposition
💡 Explanation
Liquefaction increases underwater slope instability because seismic ground motion compacts loosely packed sediments, therefore increasing pore water pressure, causing the sediment to behave like a viscous fluid rather than a solid. This occurs during shaking, rather than uplift or redeposition phenomena.
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