Yearly Variations of Terrestrial Phenomena and Solar Activities. 



Fig. 3. Kyoto. 



Class II. Frequency is 

 maximum when |A'— aS'I is small 

 and minimum when it is large. 

 The stations of this class are 

 Nase, Simonoseki, Osaka, 

 Sakai, Niigata, Akita, Sapporo 

 and Kusiro. 



Class ir. For not very 

 small value of JV and S, the 

 frequency of earthquakes is 

 maximum when ]V>S and 

 minimum when N<S. For 

 small values of N+S, the con- 

 trary is often the case, or tlie 

 relation is similar to Class I. 



The stations of this type are Miyazaki, Ooita, Saga, Kobe, Kyoto, 

 Tu, Gihu, Husiki*, Hamamatu and Tokyo. 



The most typical examples of these classes are illustrated in 

 figs. 1,2 and 3. 



Taking together all stations belonging to the same class, the 

 number of stations with maximum or minimum of frequency in 



3 .■• 







Fiff. 4. Class I. 



Fiff. 5. Class 11. 





.".' . /■■ 



7^ ^ 



