NOTES ON THE JAMAICA EARTHQUAKE OT 
depth as the water level is here within a few feet of the surface. 
The locality on the mainland where the cracks are most numerous 
seems to be east of the city between the end of the trolley line and 
the government quarries at Rockfort. At this point the shock was not 
Fic. 5.—Earthquake cracks due to lateral displacement toward the sea, near 
Rockfort, Kingston. (Photo by Fuller.) 
only more severe, but the road built on an artificial shelf at the water’s 
edge and only five feet above it, offered especially favorable conditions 
for fissuring. Cracks were observed along this road for a distance of 
half a mile. Some were less than five feet in length and only about one 
inch in breadth, while others up to one hundred feet or more and with 
a width up to four inches were noted. Most of the cracks were irregu- 
