Changes

The severity of earthquakes is measured using the Moment Magnitude scale, which replaced the [[Richter scale]] in the 1970s. The largest quake ever recorded had a magnitude of 9.5; it struck [[Chile]] in 1960.<ref>http://earthquake.usgs.gov/earthquakes/world/10_largest_world.php</ref> Technically the Moment Magnitude scale only measures the absolute magnitude; the Mercalli scale is used to measure the felt magnitude - essentially how much the ground shakes over the [[epicenter]] of the quake.

The severity of earthquakes is measured using the Moment Magnitude scale, which replaced the [[Richter scale]] in the 1970s. The largest quake ever recorded had a magnitude of 9.5; it struck [[Chile]] in 1960.<ref>http://earthquake.usgs.gov/earthquakes/world/10_largest_world.php</ref> Technically the Moment Magnitude scale only measures the absolute magnitude; the Mercalli scale is used to measure the felt magnitude - essentially how much the ground shakes over the [[epicenter]] of the quake.

==Causes of Earthquakes==

==Possible Causes of Earthquakes==

'''Plate Boundaries'''

'''Plate Boundaries'''