San Francisco earthquake of 1906

Found a postcard sent by Dess's sister Cordelia who along with her brother, LeRoy or Sully I believe, was in San Francisco at the time of the earthquake.  Not a lot of info on this so far. The earthquake is variously graded between 7.7 and 8.25. I am still going through mom's research and hope to find it and post it. Until then, found this picture on the Internet.