epicenter		point of the initial fault rupture where an earthquake originates that usually lies at least several kilometers beneath Earth's surface
fault		point on Earth's surface directly above the focus on an earthquake
focus		facture or system of fractures in Earth's crust that occurs when stress is applied too quickly or stress is too great; can form as a result of horizontal compression.
magnitude		measure of the energy released during an earthquake, which can be describing using the Richter scale
modified mercalli scale		measures earthquake intensity on a scale from 1