What causes a mega tsunami?

Answer 1

A mega tsunami is typically caused by large-scale geological events, such as underwater earthquakes, volcanic eruptions, or landslides that displace significant amounts of water. When an earthquake occurs, particularly in subduction zones, it can trigger massive waves if the seafloor shifts abruptly. Similarly, a volcanic eruption can displace water when a volcano collapses or erupts explosively. Landslides, especially those occurring near Coastlines, can also generate large waves that travel at high speeds across the ocean.