ON SEISMOLOGICAL INVESTIGATION. 



209 



Hakone, 9 A.M. (August 5). 



A strong earthquake was felt here this morning at about 9.20 o'clock 

 It lasted for several minutes, but -was quite regular (horizontal) in its 

 movement. The Japanese say that they seldom have such a long or 

 strong earthquake here, and they rushed out of their houses very 

 quickly. 



ShizuoJca (August 5). 

 A slight earthquake was felt here at 9.20 a.m. 



Sendai (August 6). 

 A strong earthquake occurred here this morning at 9 o'clock. 



Mito (August 5). 



A strong gale swept over the locality last night, and this morning a 

 sharp earthquake was felt here. 



Mayehashi (August 5). 

 An earthquake occurred here this morning at half -past 9 o'clock. 



Uyeda, Shinshu (August •!?). 



An earthquake was felt here this morning at half-past 9 o'clock. 

 The earthquake is also reported from : — 



frifu, 7.57 A.M., slight. 

 Nagasaki, 8.06 A.M., slight. 

 Kumagaya, 9.07 A.M., strong. 

 Ishinomald, 9.10 A.M., strong. 

 Mito, 9.10 A.M., strong. 

 Aomori, 9.11 A.M., strong. 

 Yaviagata, 9.11 A.M., strong. 

 Atayebashi, 9.11 A.M., strong. 

 Niigata, 9.12 A.M., strong. 

 Kofu, 9.12 A.M., strong. 

 Fuliushima, 9.10 A.M., feeble. 

 Nagano, 9.11 a.m., feeble. 



Glfu, 9.11 A.M., feeble. 

 Utsxinomiya, 9.12 A.M., feeble. 

 ToUo, 9.12 A.M., feeble. 

 YoJiosuka, 9.12 A.M., feeble. 

 JVagoya, 9.13 A.M., feeble. 

 A/iita, 9.20 A.M., feeble. 

 ChosM, 9.12 A.M., slight. 

 Numam, 9.12 A.M., slight. 

 JVemvro, 9.12 A.M., slight. 

 Xushiro, 9.13 A.M., slight. 

 Hachihi, 9.15 A.M., s'ight. 



By reference to the catalogue of earthquakes recorded at the Central 

 Meteorological Observatory in Tokio, p. 190 (Nos. 1901 to 1908), it will be 

 seen that on the 5th the first disturbance was followed by seven smaller 

 disturbances. 



From these reports, and from private correspondence with Japan, we 

 learn that the movements were slow. This means that the period of the 

 earth waves would be about three seconds. This being so, experience 

 teaches us that places like Tokio were at a distance of 200 or 300 miles 

 from the origin of the disturbance. 



The fact that movements commenced at and near to Tokio at about 

 the same time they commenced at and near to Nemuro, whilst at Ishino- 

 maki, Mito, Aomori, Yamagata, and other places lying between Tokio 

 and Nemuro, movements commenced one or two minutes earlier, leads to 

 the conclusion that the origin was off the east coast of Japan. 



From the time observations generally, the locus sought for may be placed 

 near to the centre of a circle which would approximately pass through Tokio, 



1898. P 



