Which risk increases when a megathrust earthquake deforms the seafloor during seafloor displacement?

💡 Explanation

When a megathrust earthquake deforms the seafloor, rapid vertical displacement occurs because of the sudden release of built-up stress, leading to the generation of a tsunami. Therefore a tsunami results, rather than storm surge amplification, landslides due to cryoseism, or coastal erosion, all of which require different environmental triggers.

• Which outcome results when excessive upwelling removes bottom sediment nutrients?
• Which effect on marine ecosystems results when upwelling currents are disrupted by strong, persistent offshore winds?
• Which process controls the morphology of braided streams carrying significant alluvial sediment loads?
• Which process creates an alluvial fan when a high-gradient stream flows onto a valley floor with reduced slope?
• Which atmospheric change occurs when increased polar ice melt disrupts the Hadley Cell?
• Which process primarily maintains the anticlockwise circulation of the North Pacific Subpolar Gyre?