MEMOIRS 



OF 



THE GEOLOGICAL SURVEY OF INDIA. 



List of Aftershocks of the Great Earthquake of 12th June 1897, 

 compiled by R. D, Oldham, A. R. S. M., F. G. S., Super, 

 zntendent, Geological Survey of India. 



After the great earthquake of 12th June a few persons kept 

 records of the aftershocks felt by them. At a later date I was able 

 to interest a large number of observers and obtained a tolerably 

 complete record of aftershocks. In the following pages so much of 

 the data received as seemed desirable to publish has been printed. 



These records necessarily lack the completeness and constancy 

 of standard of an instrumental one but such as they are, they seem 

 worthy of publication as the influence of lunar and solar attraction, 

 if it has any appreciable influence, should be much more marked at 

 a place where the earth crust was in a state of strain verging on 

 the breaking point and a time when earthquakes were of constant 

 occurrence, than at a more quiescent period or in a more stable 

 locality. 



The principal faults of the records printed are the inevitable one, 

 of incompleteness during the hours of the night and inaccuracy of 

 time. The continuous records at Mairang, Maophlang, and Tura 

 are all from places where, in the absence of a telegraph station, 

 accurate time keeping is impossible, and the records quoted in the 

 general list No. XIV show how divergent may be the recorded times 

 even at places where' exact time is procurable. 



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