194 F. OMORI AND K. HIKATA : 



of motion in the two horizontal components during this epoch 

 having generally no relation to the corresponding ratio for the 

 principal portion. 



The directions of the maximum movements in different 

 earthquakes are given in the 10th column of the Table, from 

 which it will be observed that these were, with the exceptions 

 of Eqkes. No. 5 and No. 16, nearly EW, ESE— WNW or 

 ENE— WSW. (See fig. 9). It will also be seen that the majority 

 of the suboceanic earthquake origins were situated towards the 

 E, ESE and ENE of Miyako, so that we may, in a general 

 way, say that the directions of the maximum earthquake move- 

 ments were nearly coincident with the directions of the lines 

 joining the observing station with the epicentres. The fact that 

 the origins under consideration were chiefly in the directions 

 of SE or ESE from Miyako, while the majority of the directions 

 of the maximum movements were included between the directions 

 EW and NE — SW, seems to indicate some peculiarity inherent 

 in the region about the observing place, causing the direction 

 of motion in different earthquakes to approach to a certain 

 prevailing direction. 



In the cases of nine earthquakes. Nos. 1, 2, 3, 8, 10, 14, 

 16, 19 and 22, the directions of the maximum movements did 

 exactly, or roughly, coinside with the respective directions of the 

 origins from Miyako ; and especially, in three earthquakes, Nos. 

 8, 11 and 20, the angles of emergence have been measured 

 respectively to be 7°. 2, 9° and 36°. Of these three last earth- 

 quakes, two, namely, Nos. 8 and 20, were the after-shocks of the 

 Eqke. No. 4 ; while the remaining one, No. 11, had its origin 

 under the Ocean, towards NE of Miyako. The value of 36° for 

 Eqke. No. 20 was evidently too great, the error being probably 



