Extreme Weather: Tsunamis

Extreme Weather: Tsunamis — page 1 — 4 CHAPTER 1 HOW TSUNAMIS FORM A tsunami is a group of huge waves that hit land Most tsunamis are caused by earthquakes These earthquakes happen deep underwater The ocean floor is made up of many tectonic plates WATCH A VIDEO HERE

Extreme Weather: Tsunamis — page 2 — 5 These huge plates move very slowly Sometimes two plates run into each other When that happens those plates can cause an earthquake A diver swims in a gap between two of Earth's tectonic plates

Extreme Weather: Tsunamis — page 3 — 6 An ocean earthquake causes waves At first these waves are small and fast But the ocean is shallower near the shore The waves slow down as they

Extreme Weather: Tsunamis — page 4 — 7 Tsunami waves often start less than a foot tall Near shore they can become more than 100 feet tall hit the shallow water As these waves slow down they get taller When a tsunami finally strikes land the waves can be massive

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