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← GeographyWhich mechanism increases landslide risk during intense rainfall following a large earthquake in mountainous regions?
A)Seismic liquefaction decreasing soil strength✓
B)Increased pore water pressure aftershocks
C)Vegetation removal reduces cohesion root
D)Tectonic uplift altering slope angles
💡 Explanation
After a major earthquake, seismic liquefaction occurs because shaking increases pore water pressure in saturated soils, reducing their shear strength and causing them to behave like liquid during precipitation. This results in landslide risk, rather than pore pressure fluctuations, vegetation loss (alone), or tectonic movement.
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