Vol. 52.] SEISMIC PHENOMENA IN THE BRITISH EMPIRE. 657 



leaves Manipur south of it, but includes within the area the middle 

 and upper valleys of the Barak and its right-bank affluents. Centres 

 of vibration are closely clustered together, and severe shocks have 

 been often felt. 



Fig. 2. 



A SSA M. 



Kilometrical Seismicity 

 and Seismical Localities. 



Coa!p»ro 



S4 Km 



The numbers after place- 

 names are those c/ the 

 recorded shocks. 



3. Gujerat and Bombay. 



^ = 135 kilom. (1868-1872). S*=66 kilom. 

 (17 localities and 53 shocks.) 

 The boundaries of this region are very indefinite. There is a 

 rather unstable centre of vibration on the southern flank of the 

 Mahadeva Range. 



4. Kdch and Sindh. 



iSf, =195 kilom. (1841-1846, 1864-1870). # 2 * = 96 kilom. 



(11 localities and 86 shocks.) 



In this region there is a remarkable centre of vibration in the 



neighbourhood of Lakpat. As to the famous upheaval of the levee 



of Allah or Bhndj, that is a phenomenon which in all probability 



had nothing seismic about it. 



5. Kumdon, Nepal, and SilcMm. 



£, = 212 kilom. (1828-1833, 1842-1843). S 2 * = 104 kilom. 



(11 localities and 33 shocks.) 

 This region, which includes the southern slopes of the Himalayas, 

 is probably much more unstable than the above figures would appear 

 to indicate. Darjiling and Sikkim are frequently shaken by earth- 

 quakes. 



Southern slope of the Himalayas : 

 S { = 71 kilom. £ 2 *=35 kilom. 



