[[Image:Deformed_rock.jpg|thumb|300px|Deformed rock]]'''Deformation''' is a change in the original shape of a material. When we are talking about earthquakes, deformation is due to stress and strain.<ref>http://earthquake.usgs.gov/learning/glossary.php?term=deformation</ref>
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[[Image:Deformed_rock.jpg|thumb|300px|Deformed rock]]'''Deformation''' is a change in the original shape of a material. When we are talking about [[earthquake]]s, deformation is due to stress and strain.<ref>http://earthquake.usgs.gov/learning/glossary.php?term=deformation</ref>