| − | A trembling or shaking of the [[earth]] as a result of [[rock]]masses suddenly moving along a [[fault]].<ref>Wile, Dr. Jay L. ''Exploring Creation With Physical Science''. Apologia Educational Ministries, Inc. 1999, 2000</ref>
| + | Earthquakes cause a significant natural [[hazard]] to populations living in areas prone to earthquakes and responses to the hazard vary with economic development. |