What Is A Tsunami?

Tools

By By Steve Pool

SEATTLE - A tsunami is a large wave that can come ashore at heights of over 100 feet tall. It is one of the most devastating natural disasters that Mother Nature can unleash.

A tsunami is frequently, yet mistakenly, referred to as a "tidal wave". But tides have nothing to do with tsunamis. It's created when something displaces a large column of water.

The most frequent causes of tsunamis are earthquakes that occur in the oceans. The rise and fall of the ocean seafloor during quakes can displace a large amount of water, causing a tsunami. But large objects, such as a huge meteorite, can also cause tsunamis.

They're hard to spot at sea, because in the middle of the ocean, where water depths are hundreds of feet, the sea level might rise only a couple of inches, but when the wave reaches shallow shores, it can reach over 100 feet high.

For More Information:

www.pdc.org

www.science.org

Your Photos

YouNews Chasing Rainbow. Chasing Rainbow.
While I was busy working, suddenly I turned my head towards the window to see a perfect rainbow and a cruise ship moving fast towards it. Frantically I grabbed my camera and ran to the balcony to take the shot just when the ship appeared to be entering the rainbow.
YouNews Seattle Couple Embraces Seattle Storm Seattle Couple Embraces Seattle Storm
A lot of guests had trouble getting to Nick and Jane's wedding, but there seemed to be a magical bubble around the wedding itself - sunny and only a few big gusts while safe in the church... until well into the cozy inside Broadmoor Golf Club reception.
YouNews Coudy and windy afternoon Coudy and windy afternoon
I took this photo this afternoon at Kerry Park. It was windy, cloudy and a few drizzles falling at times.