In 1906, a large earthquake struck San Francisco, killing approximately 3000 people and starting a fire which burned about 4.7 square miles of cityscape. <ref>http://earthquake.usgs.gov/regional/nca/1906/18april/casualties.php</ref>. The earthquake originated on the [[San Andreas]] fault, which continues to threaten major Californian cities. | In 1906, a large earthquake struck San Francisco, killing approximately 3000 people and starting a fire which burned about 4.7 square miles of cityscape. <ref>http://earthquake.usgs.gov/regional/nca/1906/18april/casualties.php</ref>. The earthquake originated on the [[San Andreas]] fault, which continues to threaten major Californian cities. |