Which mechanism increases lahar hazard during and after stratovolcano eruption sequences?

💡 Explanation

When a stratovolcano with glaciers erupts, rapid glacier melting destabilizes the unconsolidated volcanic ash deposits on steep slopes because meltwater adds weight and reduces friction. Therefore, glacier melting destabilizing ash deposits increases lahar hazard, rather than flow generating convection, heat altering soil, or uplift modifying drainage.

• Which effect accelerates longshore drift when approaching headlands?
• Which morphological consequence results when glacial erosion deepens valleys?
• Which risk increases when thermohaline circulation weakens substantially due to polar ice melt?
• Which outcome occurs from Antarctica's density-driven water circulation?
• Which risk increases when highly viscous magma generates pyroclastic flows?
• Which mechanism causes stream channel incision when tectonic uplift increases land slope?