Which risk significantly increases near a subduction zone after a megathrust earthquake?

💡 Explanation

After a megathrust earthquake, slope stability is reduced because seismic shaking weakens soil cohesion and fracturing occurs, increasing landslide risk. Therefore, landslide potential increases, rather than altered salinity, reef bleaching, or dune formation which require distinct environmental triggers and conditions.

• Which process triggers widespread lacustrine landslides when glacial meltwater rapidly fills a proglacial lake?
• Which mechanism establishes areas of high rainfall and lush vegetation within the intertropical convergence zone (ITCZ)?
• Which mechanism explains stream meandering increases due to reduced sediment load below dams?
• Which geological process commonly generates strike-slip faults in Earth's crust?
• Which process initiates cirque formation in mountainous terrain after prolonged snowfall?
• Which process exacerbates liquefaction during seismic activity, resulting in structural instability?