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.

• Which outcome results when prevailing winds consistently refract toward headlands?
• Which atmospheric effect is influenced by increased land-sea temperature contrast during summer monsoons?
• Which outcome is more likely when floodplain levees subside unevenly?
• Which mechanism explains the development of columnar basalt when lava cools?
• Which long-term outcome arises when intense chemical weathering of basalt releases soluble cations in tropical lateritic systems?
• Which process primarily causes the formation of alluvial fans at the base of mountain ranges within arid climates?