Amazing True Colour Photographs Of The 1906 Earthquake
http://sfist.com/2010/01/12/san_franciscos_great_1906_earthquak.php
None of these are colorized. They were made using the colour photography process invented by Frederick Ives in the 1880s, which you may read about in this fascinating magazine article from 1897: http://homepage.ntlworld.com/forgottenfutures/krom/kromskop.htm