[ac·​tive folt] A fault (which is an area where two pieces of land slide vertically from each other) where an Earthquake may happen soon.

[mag·nuh·tood] Magnitude is a measure of the amount of energy released during an earthquake. It may be expressed using the Richter scale.

[size·muh·graf] A seismograph is a very sensitive instrument (a tool and/or a machine) that records and measures earthquakes. When an...