Our Record of Canadian Earthquakes. 



18 



Light, 



Moderate 



IV. Shock reported by persons in mo- 

 tion ; shaking of movable objects, 

 doors and windows ; cracking of 

 ceilings. 



V. Shock felt generally by every one . 

 ^furniture shaken ; some bells rung; 



VI. General awakening of sleepers; 

 general ringing of bells ; swinging 

 of chandeliers ; stopping of clocks ; 

 visible swaying of trees ; some per- 

 sons run out of buildings. 



( V1L : Overturning of loose objects ; fall 

 « , j of plaster ; striking of church bells ; 



10D ^" | general fright, without damage to 



(, buildings. 



a | VIII. Fall of chimneys ; cracks in the 



bevei ' e { walls of buildings. 



fIX. Partial or total destruction of 

 some buildings. 



Destructive ^ X. Great disasters; overturning of 



rocks ; fissures in the surface of the 

 (^ earth ; mountain slides. 



To these may be added the following questions addressed 

 to the public, on behalf of the Geological Survey of the 

 United States, on occasion of the Charleston earthquake of 

 1886 (Science, Sept. 10, 1886) : 



" 1. At what hour, minute and second of standard time 

 was it felt ? When this can be accurately given, it is of the 

 very greatest importance. Be particularly careful to state 

 whether it is standard (railway) time or local time ; whether 

 the watch or clock was compared with some standard clock 

 at a railway station or elsewhere, how soon, what the error 

 was, and whether you corrected your observation by this 

 comparison or not. 



" 2. How long did its perceptible motion continue ? 



"3. Was it accompanied by any unusual noise? If so, 

 describe it. 



"4. Was there more than one shock felt? If so, how 

 many? When several were felt, give accurately, or even 

 roughly, the number, duration and character of each, and 

 the interval between them. 



