What I’ve learned about earthquakes and earthquake prediction is that you almost never know when an earthquake will occur, but in certain areas that get a lot of earthquakes, you could probably predict when one is about to happen.

The time differences between the earthquakes.

The stress that accumulates along the fault lines

Haiti Chile Pacific Plate is an area where 90% of the

worlds earthquakes occur.

Where on Earth do most of the really big earthquakes strike?

A strainmeter can tell an earthquake's vibrations or shock waves and are detected by its seismometer component and recorded by its seismograph, is what seismologists use to predict earthquakes.

A fossil seismograph, to help geophysicists and other researchers understand patterns of seismic activity.