OTHER EARTHQUAKE FEATURES
San Franciscans mark the 100th anniversary.
Video: 1906 Earthquake
1906 San Francisco quake remembered
April 18: The estimated 7.8 magnitude San Francisco earthquake struck without the faintest whisper of a warning 100 years ago today. NBC's George Lewis reports.
Interactive: When's the next Big One?
When and where will the next Bay Area quake strike? History may provide clues.