100 



COGGIfl BROWN: THE BURMA EARTHQUAKES OF MAY 1012. 



the Chin Hills came the news that the shock was so slight as to 

 be almost imperceptible. In Rangoon it was very Blight and only 

 just perceptible, yet withal strong enough to swing hanging lamps, 

 and to stop the delicate sidereal and local mean time clocks in 

 the Port Commissioners' Time Ball observatory. These clocks were 

 both in such a position that their pendulums swung normally 

 between north and south, and their movements were probably 

 stopped through their having struck the back inside casings. These 

 observations tend to prove that the direction of the shock was 

 from east to west, for another pendulum clock in the observatory, 

 which faced south with its pendulum swinging east and west, did 

 not stop and was not affected. Nevertheless other observers in 

 Rangoon assert with equal confidence that the direction was from 

 north to south. 



There are not many details given in the reports from this 



area. The shock is generally referred to as 



Absence of detailed a j on _ s ] mv wavc w hich was onlv felt by 



accounts. . ' , T iiii-. 



certain people. Lamps and other banging 



objects like suspended weights freely swung, doors and windows 

 occasionally creaked.- Water in a river was seen to sway slightly, 

 and oil in the tanks of the Seikkyi refineries was observed to 

 move. No damage of any kind was caused and no unusual sounds 

 were heard. 



From Ssumao in Southern Yunnan we learn that three portions 

 of an undulatory movement from north to south were still recog- 

 nisable and that a pendulum-like swing was communicated to 

 hanging lamps. 



Over the greater part of Lower Kiam the shock seems to have 

 been of much the same intensity. In Bangkok clocks were stopped 

 and electric lights and fans set swinging. 



The north-western corner of the Akyab district marks the limit 

 of the felt shock in that direction, as nothing was noticed in the 

 Chittagong district of Bengal. 



1 believe that in spite of its sketchy character, this outer 

 isoseismal line approximates very closely to the actual outer limits 

 of the shock, so far as it was perceptible to the unaided senses. 

 The area between it and the next line was remarkably free from 

 the phenomena which indicate a higher scale, i.e., general notice 

 by everyone, disturbance of furniture and movable objects. 



