ON THE AFTER-SHOCKS OF EARTHQUAKES. I45 



Kozuchi, a greater number of shocks was recorded at the former than 

 at the latter. Of the remaining six places, NakatsugaAva, Takayama, 

 Mitake, Ota, and Hachiman, the greatest number was recorded at 

 Mitake and the least at Hachiman. 



The records taken at several stations in Owari shew an evident 

 change with time of localisation of seismic frequency. In 1<S91, 

 the f'-reatest number of earthquakes was recorded at ]>iwajima, 

 Otajima, and Inazawa, these |)laces being situated in a zone where, 

 it should be remarked, the motion had been very strong on the 

 occasion of the great earthquake of October, 181)1. In 1892, the 

 gre:itest number was recorded at Koori, and the next greatest at 

 lUwajima and Katsukawa. Again, in 1893 the gre:itest number was 

 recorded still at Ko(jri, but the next greatest at Otajima and Xagoya. 

 The least numbers always occurred at Atsuta and the stations in the 

 Chita Peninsula. 



The rumibers of earth({uakes at Xagoya, Atsuta, Handa, and 

 Toyohama indicate an evident decrease of seismic actiN'ity ^\ü\\ dis- 

 tance as we go s(juth wards. 



In Mikawa, the greatest numbers of eartlujuidves occurred at 

 Koromo and Asuke in the nin-th-western part of the ])rovince. the 

 activity there being nearly the same as in the vicinity of Atsuta in 

 Owari. 



The seismic activity in the Atsumi Peninsula was less than that 

 in the Chita Peninsula. 



§ o4. The distribution of seismic activity in Mino. Owari. and 

 Mikawa during 1892, 189o, and January, 189-1, will be clearly seen 

 from Figs. 27, 2.S, and 29, respectively, in which the curves are loci of 

 places where equal numbers of shocks have been recorded during each 

 of these intervals. In drawing Fig. 28, the numbers of eartlupiakes 

 during January and September have been omitted as a se\ere sliock 



