284 Memoir on Indian Earthquakes. [No. 136. 



selected for establishing them at, and from their indications these and 

 other points of interest may be determined. 



11. Earthquake of the 23d of October, 1842. 



This Earthquake was experienced at Gowahatty, Assam, in lat. 26° 

 00' N. and long. 90° 40' E., and at Chittagong in lat. 22° 22' N. and 

 long. 91° 42' E. At the former place its effects are thus described by 

 a correspondent of the Friend of India : " Oct. 23. Between 8 and 9 

 o'clock a. m. there was a shock of an Earthquake ; the motion was 

 tremulous, and lasted about half a minute." From Chittagong another 

 correspondent of the same paper writes: "we had another Earthquake 

 here ; not so severe as the last on the 23d ultimo. The motion was 

 in the opposite direction (i. e. from East to West) and stopped one of 

 the above-mentioned clocks which vibrate N. and S. at 9h. 42m. a. m." 



It is stated that most, if not all, of the Earthquakes experienced in 

 Assam came from the Eastward. It is therefore probable, that a centre 

 of active force is situated somewhere here in the Singhpho or Eastern 

 extremity of the Naga hills, which bound the province on the East. I 

 am too imperfectly acquainted with the localities in question to be able 

 to say whether there are any physical or geological facts that throw 

 light upon this idea, and it is suggested only by the uniform regularity 

 of the direction of the shocks. 



12. Earthquake of the 25th of October, 1842. 



This was experienced at Jellalabad at half-past 1 a. m. It is cha- 

 racterised as severe, but it appears to have been one of the local shocks 

 so frequently felt throughout the valley in which that city stands. 



13. Earthquake of the 29th of October, 1842. 



The Earthquake of the 29th of October was felt at Gowahatty, 

 Assam, and forms an exception to the general rule as regards direc- 

 tion before stated, since the vibrations travelled from North to South. 

 The correspondent of the Friend of India, before quoted, thus describes 



