on Earthquakes in Japan. 



375 



Kioto area, in other countries, we should be inclined only to 

 examine those districts where earthquakes are now common. 



Century. 



1-3 



a 



3 

 u 



PH 



^3 

 





fr 



a 



a5 







a 



a. 



t4 



1 



O 



O 



a 

 £5 



42 



a 







<D 

 Q 



a.s 

 If 



rS * 



be 3 



.a a 



es 



Oh 



3° 



"a 

 



300-200... 



200-100. 



100-0. 



A.D. 



0-100 



100-200. 



200-300... 



300-400... 



400-500... 



500-600... 



600-700... 



700-800... 



800-900... 



900-1000 



1000-1100 



1100-1200 



1200-1300 



1300-1400 



1400-1500 



1500-1600 



1600-1700 



1700-1800 



1800-1900 



2 



1 



5 



"2 

 1 

 1 

 1 

 3 



*2 



1 



3 



1 

 1 

 1 



"i 



8 

 1 

 4 

 1 

 5 



1 



"5 

 1 



1 



1 



1 



2 

 4 

 4 

 2 

 4 

 3 



*7 



1 



4 



"3 

 3 



1 

 1 

 4 

 3 



27 



1 



"3 



5 

 3 



2 

 3 



6 



4 

 1 

 1 

 2 

 1 



l4 " 



"i 

 4 

 4 



1 

 1 

 3 

 4 



3 

 1 



6 



2 



34 



"i 



4 



7 



6 

 2 



2 

 3 



"l 

 1 

 2 



5 



38 



"7 



2 

 1 

 1 



2 



2 

 2 



1 

 3 

 4 



"i 

 2 

 1 

 4 



1 



1 



2 



5 



4 



"3 



'is 



3 

 1 

 1 

 3 



4 

 1 



"3 



23 



"6 



"7 

 1 

 2 

 3 



5 



"2 



4 



1 



33 



5 



"i 

 1 



7 

 3 



2 



"3 

 3 



5 



34 



1 



... 



1 



1 

 1 



"2 



1 

 1 



2 



1 



2 



"i 



13 



1 



1 



1 

 1 



2 

 2 

 17 

 14 

 65 

 21 

 25 

 20 

 22 

 27 

 45 

 17 

 26 

 31 

 28 



366 



Total ... 



18 



27 



29 



30|25 





Winter. 



Spring. 



Summer. 



Autumn. 





74 



95 



93 



90 











Winter months, 165 ; Summer months, 188. 



Thus, for instance, we should not search for a decrease in 

 England, even if our records for the last ten centuries were 

 perfect, because it is probable that the country has settled 

 down to a seismic state which approximates to constancy ; in 

 other words, the curve representing intensity of seismic action 

 in relation to time has become nearly asymptotic to the axis 

 of time. 



Occurrence of Earthquakes in Groups. 



It is often to be observed that subsequently, and now and 

 then previously, to the occurrence of an earthquake of unusual 

 severity, we have a more or less rapidly occurring series 

 of smaller attendant shakings. This fact appears to be 

 a confirmation of what we have already said respecting 

 the origin of shocks by faulting, the small preceding shocks 

 indicating the first giving way of the ground, the large shock 



