EARTHQUAKE MEASUREMENTS OF RECENT YEARS. 69 



No. Öl. — This earthqnnlve, nltlioiigh it was quite extensive and 

 its origin was comparatively near the observing station, produced 

 small motions. The vertif^al motion was visible from the commenr-e- 

 ment, and exhibited its maximum at the seventh second when the 

 horizontal motion was also largest. 



No. 61. — This extensive shock disturbed the whole of North 

 Japan, Tokyo being near the edge of the distur1)ed area. The pecu- 

 liarity in this shock was the unusually large vertical motion with its 

 slow period. 



The ratio of vertical motion to horizontal motion in Hongô 1:2*5 

 „ „ „ „ „ „ Hitotsubashi 1:6 



,, horizontal ,, in Hongö to that of „ 1:2*5 



55 vertical ,, ,, ,j ,, ,, ,, ,, i:i 



No. 62. — Originating on the shores of the Japan Sea, the shock 

 crossed the whole breadth of the main island. Nearer the origin the 

 motions were very violent and somewhat destructive ; it stopped the 

 flow of springs and shattered houses. 



No. 64. — In general features this shock resembled that of No. 62. 

 It disturbed the same parts of the country and likewise caused 

 considerable damage thoug-h in less deo-ree. 



No. 67. — Vertical and horizontal motions began at the same 

 moment, but the maximum of the latter preceded that of the former 

 by several seconds. 



No. 72. — Tökvö was comi^arativelv near tlie ori^'in. 



No. 75. — Tokyo was near the edsfe of the disturbed area. The 

 maximum horizontal and vertical motions were simultaneous. 



No. 76. — Tokyo was near the outskirt of the aitected district. 



