It turns out that tsunamis are cause when earthquakes happen out at sea. The earthquakes are caused when the plates that make up the earth’s surface suddenly push against each with a HUGE amount of energy. This causes the sea bed to rise upwards very fast and with a lot of power. This creates a huge waves which travel in all directions from the epicentre (where the earthquake happened).
The largest tsunami ever recorded was off the coast of Alaska in the USA measuring 1720 feet tall, which is about the size of 6 Big Bens on top of each other!!!!
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