Which outcome is caused by significant increase in pore water pressure within fault zone sediments during seismic activity?

💡 Explanation

When pore water pressure increases significantly during an earthquake, effective stress decreases causing soil particles to lose cohesion because buoyancy reduces friction, leading to slope instability and landslides. Therefore post-seismic landslides result, rather than creep, fewer aftershocks, or increased mainshock magnitude, all of which require different mechanisms of tectonic strain.

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