A tsunami is a series of waves caused by an underwater earthquake, landslide, or volcanic eruption. When a tsunami wave hits the shore, it can cause extensive damage.
The tsunami that hit Indonesia on December 22, 2004, was caused by a magnitude 9.1 earthquake that occurred off the coast of Sumatra. This was the deadliest tsunami in history, claiming the lives of more than 230,000 people.
The tsunami waves hit the Indonesian coast within minutes of the earthquake. They caused …