56 



47. August 16. 



Local origin. 



47*. August 18. 



48. August 21. 



It was noted at many stations in Mindanao and at Minado in the Celebes at 11.21. The real origin 

 was in the central region of Mindanao, where there were great upheavals of the ground and destruction of 

 buildings, 122 25' E. Long., 10 56' N. Lat. Records obtained in Manila and Batavia each indicate 11.14 

 as the time of origin. The time taken to reach the "Discovery," 90 distant, was therefore 21 minutes. 



The time taken by preliminary tremors, the second phase of motion, and the large waves to traverse 

 such a distance, would be approximately 16, 25, and 55 minutes. The suggestion, therefore, is that the 

 " Discovery " record may refer to the first or second phase of the Mindanao disturbance, but this, however, 

 fails to explain the absence of records at Wellington and Christchurch. Another suggestion is that the 

 "Discovery" record refers to a disturbance of local origin, resultant on tremors which originated in the 

 Mindanao area. 



