A tsunami occurs
If there is an earthquake under an ocean, tsunami is possible.
shakes
Most earthquakes are under land. An earthquake is caused by tectonic plates shifting and/or colliding together.
earthquakes under seafloor can lead to tsunamis
depression
it get weak
tsunami,flooding
The plates in the earth collide and one goes under the other
pressure builds under the plates
A seismic wave. If the earthquake occurs under water, the seismic waves can produce waves in the water called tsunami.
If people are inside they are supposed to duck under tables to protect themselves.
hide under a strong obect like a table until it is definately over :)