Jour Sc Coll Vol VII. PI. XII, 

 1 



Fig. 21 



(1), (2), (3), and (4; -Annual Fluctuation of Seisaiic Frequency 

 >. „. at Kumamoto and Tokyo. 



,Fig.21 . (5) —Annual Fluctuation of Seismic Frequency in .Japan 



20 ■« 40 



^11 I II III IV V VI VII viu IX S XI XII 



Fig. 20.— Diurnal Fhictuation of Seismic Frequency 

 ftt Kumamoto and Chiran. 

 (148 shocksl 



0-1 tt.m. 3-4 a.E 



Hour IntervalB. 

 1-2 p.m li-7pm U-12pm. 



