Which mechanism causes tsunamis after a megathrust earthquake?

💡 Explanation

Following a megathrust earthquake, seafloor deformation occurs because rapid vertical displacement of the sea floor during fault rupture suddenly displaces a large volume of water, which creates a tsunami. Therefore, seafloor deformation is the primary driver, rather than methane release, landslides, or resonance, which are secondary effects.

• Which mechanism causes cyclones to rotate counter-clockwise in the Northern Hemisphere?
• Which process causes a deep-water trench where an oceanic plate subducts under a continental plate?
• Which process dominates within a high-altitude cirque basin experiencing repeated freeze-thaw cycles?
• Which phenomenon initiates the descent of dry anticyclonic air in Hadley cells near 30 degrees latitude?
• Which process limits the height of stratovolcanoes formed at subduction zones?
• Which consequence results when intensified Hadley cell circulation interacts with increased Arctic warming?