Which risk increases when constructing a multi-story building foundation on unconsolidated alluvial soil near seismic fault lines?

💡 Explanation

When seismic waves propagate through unconsolidated, water-saturated alluvial soil, liquefaction occurs because the pore water pressure increases dramatically, reducing soil shear strength and causing it to behave like a liquid. Therefore, liquefaction-induced differential settlement results, rather than erosion, compaction, or oxidation which involve different geological processes.

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