Watch Free Online HD Moviesjoy.strong> Soon after it struck on April 18, 1906, the infamous San Francisco earthquake would prove to be one of the greatest natural disasters of all time, leveling a once-glorious cityscape and claiming thousands of lives. This fascinating National Geographic documentary chronicles the lead-up to the quake and the drive to survive and rebuild in its aftermath, as told from the perspectives of the people who lived through the terrifying temblor.