102 



POPULAR SCIENCE MONTHLY 



origins 



the Inyo and San Francisco of those whose causative faults 

 reached the surface of the ground. 



The general character of California earthquakes was so well known 

 that when the dispatches told of a severe shock at San Francisco no 

 American geologist had a moment's doubt that it was caused by a fault 

 movement, and among those specially conversant with the structure of 

 the affected district attention was immediately directed to several fault 

 lines, with the expectation that one or more of them would show the 

 marks of fresh dislocation. Mr. Eansome prepared a prophetic article 



Fig. 3. This Fence, Previously Continuous and Straight, was broken and parted by 

 the earthquake fault, the offset being S% feet. The line of fault, concealed by the grass, crosses 

 the grouud from left to right, touching both the dissevered ends of the fence. 



in which he indicated the lines most likely to be concerned. 2 Pro- 

 fessor Branner stated in an interview that he had immediately made a 

 forecast of the locality of the origin and that it had proved to be cor- 

 rect, and Mr. Fairbanks went at once to a zone of ' earthquake topog- 

 raphy ' with which he was already acquainted, and found a fresh 

 rupture in the expected place. 



2 Nat. Geog. Mag., Vol. 17. 1906, pp. 280-29C. 



