DEFINITION: Magnitude, in relation to earthquakes, is a numerical value representing the size of the earthquake at its origin. This is measured through seismographs, which record the amplitude/height ...

Follow Newsweek for live coverage after a large earthquake strikes off the coast of Japan.

A small 2.5 magnitude earthquake was reported in Howard County, Maryland, on Monday evening, according to the United States Geological Survey (USGS). The epicenter of the earthquake was determined to ...