This image was acquired from
flickr. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
usgs science earthquake historical throwbackthursday tbt san francisco sanfrancisco history black and white blackandwhite blackandwhite monochrome outdoor building architecture black and white San Francisco Earthquake TBT recently added photograph to our USGS Photographic Library collection shows view of house toppled by the April