Oh!! No!! it's a Tsunami

A tsunami is a series of seismic waves. Tsunami means "harbor wave". Most people refer a tsunami as a big monster wave.What we are going to learn is how they're formed. Most tsunamis at about 80% occur around the Ring of Fire. Tsunamis may also be caused by underwater landslides or volcanic eruptions. Tsunamis race across the sea at up to 500 miles (805 kilometers) an hour—about as fast as a jet airplane. Fast Huh!
The best defense against any tsunami is early warning that allows people to seek higher ground. The Pacific Tsunami Warning System, a coalition of 26 nations headquartered in Hawaii, maintains a web of seismic equipment and water level gauges to identify tsunamis at sea. Similar systems are proposed to protect coastal areas worldwide. Okay guys we are going to take a break. Why won't you listen to my video.

Okay we're back with tsunamis.
A tsunami’s trough, the low point beneath the wave’s crest, often reaches shore first. When it does, it produces a vacuum effect that sucks coastal water seaward and exposes harbor and sea floors. This retreating of sea water is an important warning sign of a tsunami, because the wave’s crest and its enormous volume of water typically hit shore five minutes or so later. Recognizing this phenomenon can save lives. Okay that's it guys. Peace out y'all.