How Tsunami Occurs

Analysing skills to select key information to summarise the cause and effect of a natural disaster.

Tsunami is one of the world's most powerful natural disasters. It mostly happens after earthquake.

The cause of a Tsunami is when big pieces of the Earth’s crust called tectonic plates suddenly shift. When these tectonic plates shift, they usually grind together. But sometimes, the plates get stuck. As they get stuck, the pressure builds. When the pressure builds, they suddenly crash into a new position. As the ocean floor moves, it creates humongous holes, that is when the water fills up these holes. After that, the water begins to move quickly making big waves. That's how Tsunamis are born.

1. A tsunami can swallow up islands in minutes.
2. They damage buildings and properties.
3. People can die.
4. People could get homeless.
5. No shelter.