Which outcome frequently occurs at subduction zones because of rapid plate convergence exceeding material strength?

💡 Explanation

Megathrust earthquakes happen because sudden stick-slip `elastic rebound' releases built-up stress when fault friction is overcome at subduction margins; therefore, strong earthquakes occur, rather than constant trench formation that would require continuous, gradual deformation.

• Which outcome decreases the effectiveness of sediment bypassing systems installed alongside coastal barrier islands?
• Which morphological result accelerates because uneven surface deflation concentrates wind energy?
• Which outcome increases due to decreasing stream competence in alluvial fans?
• Which hydrological consequence results when speleothems seal cave entrances?
• Which outcome on coastal dunes results when vegetation removal exceeds sand supply replenishment?
• Which crustal response originates when hydration weakens subducting oceanic lithosphere?