Which mechanism initiates liquefaction during an earthquake when seismic waves propagate through saturated soil?

💡 Explanation

When seismic waves pass through saturated soil, the cyclic loading causes increased pore water pressure because water cannot escape quickly, reducing the effective stress between soil particles. Therefore, the soil loses its strength and behaves like a liquid, rather than amplifying shear waves, direct stress decrease or grain heating which are secondary effects.

• Which net outcome results as warmer tropical air undergoes latitudinal transport?
• Which mechanism creates natural levees bordering a mature alluvial river?
• Which phenomenon directly results from the periodic elastic rebound along a transform fault?
• Which outcome occurs when a gyre circulation strengthens?
• Which mechanism causes the formation of an accretionary wedge at a subduction zone?
• Which outcome often occurs when differential stress builds along transform plate edges?