42 



The identification of the hour marks on the " Discovery " film is uncertain. If, however, we take the 

 first reading as 4h. 10 -7m. the record is fairly in accord with those which follow and refers to a disturbance 

 originating in or near to Central America. The area disturbed is similar to that given for No. 72. 



3. March 28. 



A possible approximate origin lies near to 150 E. Long., 50 S. Lat. 



4. March 28. 



Slight tremors were felt at Zamboanga in Mindanao. 



The " Discovery " record suggests an origin not more than 5" distant. The entries for Manila, 

 Batavia, and Irkutsk, however, suggest a distinct disturbance of very large extent which originated in the 

 Southern Philippines at about 6h. Om. If this is the case, the second phase of motion, or P 2 , would reach 

 the Antarctic regions at Gh. 26m., or about the time the " Discovery " shock originated. Apparently, 

 therefore, we may have a case of two shocks related to each other as a primary and a secondary. 



5. March 28. 



As entries corresponding to this do not appear in the registers from Christchurch, Wellington, Batavia, 

 and comparatively near stations, one inference is that the origin was local. 



