3G6 MIDDLEMISS : KANGRA EARTHQUAKE. 



ate, earthquake. Besides the accounts of damage done to buildings 

 and the loss of life over a large area, the shock was of sufficient severity 

 and individual character to be followed by a set of its own after- 

 shocks. The seismographs of Simla alone were kept very busy for 

 hours and days recording these, until in their case and in that of other 

 parts of the area these derivative or secondary aftershocks became 

 gradually merged and confused with the general series of ordinary 

 primary aftershocks. 



As in the case of the earthquake of 4th April, the local times 

 accorded to this shock vary enormously. Many of the wilder parts 

 of the hills could hardly be expected to furnish very accurate returns ; 

 consequently, just as was the case with the big shock of 4th April, the 

 recorded times of this which must have been one approximately simul- 

 taneous shock are spread out over at least 14 hours, namely, from mid- 

 night to 1-30 a.m. Nevertheless it is instructive to see that the 

 times recorded at the larger and more important towns such as Lahore, 

 Chakrata, Dehra Dun, Simla, Rurki, Sialkot, Palampur and Saharanpur 

 are very close to those recorded by the Simla seismographs, none of 

 them being more than 2 or 3 minutes out — a fact which confirms our 

 speculations on the comparative reliability of the recorded times of 

 the original shock of 4th April as received from important and unim- 

 portant towns respectively (see p. 285). 



The shock appears to have been certainly recorded by the Milne 

 seismograph at Alipore, Calcutta, where the figures given are in stan- 

 dard time :— Commencement of preliminary tremors 1h. 15'8m. Maxima 

 1e. 19*9m. Duration 1h. 11'2m. and maximum amplitude measured 

 from the base line 1400mm. Unfortunately these figures cannot be 

 compared with the Simla ones because of the query mark attached to 

 those furnished by the Omori-Ewing instrument. 



The intensity- of this shock at the epicentrumin the neighbourhood 

 of Rampur in Bashahr and the Saraj tehsil of the Kangra District 

 must have been about IX of the Rossi-Forel scale judging by the damage 

 done and the loss of life to men and animals. The position is 

 noticeably near the E.S.B. end of the meizoseismal area of the big 



