earthquakes under seafloor can lead to tsunamis
That is a fault line.
shakes
no a volcano
pressure builds under the plates
Tsunami and/or Earthquake. I'm not 100% about some of the other stuff.
That is a fault line.
the focus
This is known as the focus or hypocentre of an earthquake.
If there is an earthquake under an ocean, tsunami is possible.
the hypo-center
tsunami
shakes
An earthquake occurred under the pacific sea floor.
It can trigger a tsunami.
Most earthquakes are under land. An earthquake is caused by tectonic plates shifting and/or colliding together.
no a volcano
A tsunami occurs