Which outcome occurs when intense rainfall saturates volcanic ash deposits?

💡 Explanation

A lahar is triggered because intense rainfall mobilizes loose volcanic ash via soil particles' leaching, creating a dense, rapidly flowing mudflow known as a debris flow; therefore, lahars form, rather than pyroclastic flows decreasing alone affecting slopes.

• Which outcome occurs when groundwater discharge exceeds infiltration capacities within an alluvial fan?
• Which consequence results when focused groundwater recharge interacts with limestone features?
• Which consequence results when increased sediment deposition overtops artificial levees on an alluvial plain?
• Which outcome occurs following magma convection decline within a lava dome?
• Which geographic outcome occurs when an oceanic plate subducts under a less dense continental plate?
• Which regional pattern is disrupted during El Niño?