EARTHQUAKE MOTION TO ORE AT DISTANCE 



151 



at Nicolaiew, O h 17'", if due to this earthquake appears to indicate a different phase 

 of tin- ilisturlwince from that here characterised as the first phase. The times for the 

 second phase at Rocca di Papa (35'3) and at Ischia (35'2) are shown hy the detailed 

 description to refer rather to tin- maximum of this phase than to the commencement 

 as registered on other insti ummts. The "maximum " at the Ilocca di Papa at 45", 

 the commencement of undulations of 7' peruxl at 45'2 m , and the commencement of the 

 slow undulations of Catania (42"') all appear to refer to an earlier movement of this 

 phase than the other records. 



Converted into time intervals, these times become 



7. TURKESTAN, September 17, 1897. 



On August 15, 1897, an earthquake was felt in Turkestan, and two others of 

 greater severity on September 17. These have been made the subject of a special 

 study by Dr. AOAMENNONE.* In this the epicentre is supposed to have been the 

 same for all three. As the first is not recorded from any other place except Tashkent, 

 this must be regarded as uncertain, and the records will not be taken into considera- 

 tion. The other two were felt at a number of places, with greatest severity at Jisak 

 and Ura Tube, where the earthquake reached 8 degrees of the Rossi-Forel scale, while 

 the most distant was Kasalinsk, some 800 kiloms. from Jisak. 



The epicentre is taken by Dr. AGAMENNONE as being on the northern slope of the 

 mountains south of Ura Tube and Jisak, and the great extent of country over which 

 the earthquakes, which only reached 8 degrees of the Rossi-Forel scale at their 

 epicentre, were felt, is attributed to the depth of the focus from the surface. It 

 seems more reasonable to suppose that the epicentre lay in the western Tian Shan 



* 'Bol. Soc. Sisinol. Ital.,' vol. 4, Part I., 1898, pp. 120-123. 



