How a Landslide Can Create a Tsunami

A landslide can trigger a wave taller than a skyscraper, and it doesn't need an earthquake to do it. This video breaks down how landslide tsunamis actually form, from the 1958 Lituya Bay megatsunami (the tallest wave ever recorded) to the record-breaking 2025 Tracy Arm landslide tsunami in Alaska, the deadly 1963 Vajont Dam disaster in Italy, the 2018 Anak Krakatau volcano collapse in Indonesia, and the mysterious nine-day seismic signal traced to a mega-tsunami in Greenland's Dickson Fjord. You'll learn the real science behind subaerial and submarine landslides, why these tsunamis give almost no warning, and why melting glaciers are making landslide-triggered megatsunamis more common as the climate warms.