Which outcome occurs when sediment accumulation restricts fluid escape along a subduction zone?

💡 Explanation

Episodic, shallow, megathrust earthquakes occur because increased pore pressure reduces effective stress via Terzaghi's effective stress principle, leading to stick-slip behavior and sudden rupture. Therefore, unstable slip occurs rather than steady creep, because of increased stress from the excess sediment pore pressure.

• Which consequence results when levee compaction subsides unevenly?
• Which process is accelerated by freeze-thaw weathering acting on a cirque headwall?
• Which mechanism causes reduced sediment deposition rates within an oxbow lake compared to the active river channel?
• Which outcome occurs when the Coriolis effect weakens locally?
• Which morphological change occurs when acidic groundwater's flow rate drops critically inside a karst cave system?
• Which slope failure accelerates when freeze-thaw cycles increase water content in permafrost-affected soils?