Geohazards: Tsunamis

By: Isabella Faison


-Most tsunamis are caused by earthquakes. An earthquake occurs when a large area of the Earth's crust suddenly moves. When this happens underwater, big gaps may appear on the ocean floor. When water moves in to fill this gap, a tsunami is born.

-Tsunamis are dangerous to people because they are huge waves that can flood a city. It should be a concern because tsunamis can kill and hurt people.

-80% of tsunamis happen in the pacific ocean's "ring of fire".

Tohoku Tsunami Strikes Sendai Japan 2011 New Footage

More about tsunami

-Tide gauges measure the height of the sea-surface and are primarily used for measuring tide levels.

-On March 11, 2011, a magnitude-9 earthquake shook northeastern Japan, unleashing a savage tsunami. On December 26, 2004, a magnitude-9 earthquake shook off the west coast of Sumatra, Indonesia that created a tsunami, killing 230,000 people.

  • -Ways to protect/prepare for tsunamis: stay on higher levels, pack an disaster supply kit, and listen to the radio for further information.