96 



REPORTS ON THE STATE OF SCIENCE. 



In the following table megaseisraic origins are classified under three 

 heads : — 



I. Refers to the East Pacific Coast north of the Equator, including- 

 the parallel Antillean Fold, shown on the map as District C. 



II. Refers to the Western and South -Westei-n portions of the North 

 Pacific. 



III. Refers to the folds extending from the Balkans to the Himalayas. 



The first two divisions relate to earthquakes with a sub-oceanic origin, 



whilst the third relates to those which have originated in a continental 



area. 



I. 



If we take the months April to September as summer months, and 

 October to March as winter months, we find the following numerical 

 seasonal distribution : — 



Summer Winter 



N.B. Pacific 33 60 



W. and S.W. Pacific 80 74 



Balkan and Himalayan 85 29 



Total 



148 



163 



These epitomised results indicate that on the west side of the Pacific 

 seismic frequency is greatest in summer, whilst on the eastern side it is 



greatest in winter. 



