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==References== <references/> * {{cite web|url=https://earthquake.usgs.gov/learning/glossary.php|publisher=United States Geological Survey"|title=Photo Glossary of Earthquakes|access-date=March 8, 2009|url-status=dead|archive-url=https://web.archive.org/web/20090227061801/http://earthquake.usgs.gov/learning/glossary.php|archive-date=February 27, 2009}}
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