XOTES ON JAPANESE EARTHQUAKES. 



423 



and 1892, are, owing to the after-shocks of the great Mino-Owari 

 earthquake of the 28th October 1891, unusually great. The 

 mean yearly number of earthquakes in Kyoto, deduced from the 

 other eleven years, is 5. 



TABLE XIV. 



Yearly Earth(|uakc Xumbers in Kvnto. (Detween 1885 and 1897). 



25. The annual variation of seismic frequency in Kyoto. 

 The monthly distribution of 228 strong earthquakes^ in Kyoto 

 is shown in Tables XY, XVI and XVII, and illustrated in 

 ligs. lo and 1-3. 



According to Table XV, the maximum monthly numbers 

 of 2*.) and 28 occurred respectivel}^ in August and December, 

 and the mininuim of 13 both in February and September, the 

 ratio of the greatest and least numbers being as 2.2:1. Accord- 

 ing to Table XVI, the maximum seasonal number of Go occur- 

 red in Summer and the minimum of Ö2 in Autumn, the ratio 

 of the two numbers being as 1.3:1. Comparing Tables XV 

 and XVI with Tables III and IV, we find that the months 

 and seasons of the maximum and minimum seismic fre- 

 (j[uencies were nearly identical foi- strong earthquakes in Kyoto and 



1) Including 34 destructive earthquakes. 



