NOTES OX JAPANESE EARTHQUAKES. 



419 



TABLE XI. 



Xnml)ev nf Destructive Earthquakes in Kyoto. 



As will be o])served from fig. 10, two destructive earthquakes 

 happened sometimes in one year, but at other time none hap- 

 pened in an interval of more than oO or 100 years. Examples 

 of the latter case are the follo\Ying : intervals of 65 years be- 

 tween the 22nd July 976 and the 2r)tli August 1041, of 105 years 

 between the 26th August 1245 and the 6tli July 1350, of 119 years 

 between the 29th M;iy 1466 and 18th December 1585, and of 123 

 years between the 28th October 1707 and the 19th August 1830. 



In Table XIT, the 34 destructive earthquakes in Kyoto are 

 divided into five groups. The interval between the mean epochs 

 of the successive groups varies between 209 and 285 years, 

 giving the average of 240. 



As the total number of destructive earthquakes in Kyoto 

 is only 34, it is impossible to determine whether there was any 

 permanent variation in the activity of such earthquakes. But 

 it seems probable that there was nothing of the kind. Thus 

 dividing the interval of 1100 years from the 9th century to 



