[[Image:Active_fault.jpg|thumb|300px|The Emerson fault, one of the segments that ruptured in the M7.2 1992 Landers, Calfornia earthquake. (Photo by Kerry Sieh, Caltech)]]An '''Active fault''' is a [[fault]] that is likely to have another earthquake sometime in the future.<ref>http://earthquake.usgs.gov/learning/glossary.php?term=active%20fault</ref>