KAKTIIUUAKES OF NOV. 15 TO DRC. II, 1890. G27 



accounts from 12 different places, but several of these accounts are 

 detailed and of j^jreat value- 



The shock was felt at the following places : — Aldourie, Balna- 

 fettack, Bcauly, Boleskine, Briu, Bunclirew, Cawdor, Chines, Ding- 

 wall, Dores, Inchbrecn, and Inverness. It is said not to havo been 

 felt at Delrachnie, Duthil, Forres, Fort George station, Fowlis 

 station, and Kingussie, but this may have been owing to the early 

 hour of occurrence. 



The disturbed area is thus 38 miles long, 27 miles broad, and 

 contains about 820 square miles ; the longer axis is about N. 42° E. 

 and S. 42° W. : the centre 4 miles S. 34° W. of Inverness. 



2. Nature of the SJiock. — This shock was distinguished from that 

 of Nov. 15 by its sharpness and short duration. It lasted about 

 3 seconds at Inverness and Balnafettack, and about 2 seconds at 

 Dores. The following accounts will best describe its nature : — 



Dores : one principal vibration, mainly vertical, first upward and 

 then downward, preceded and followed by vibrations that did not 

 admit of being counted. 



Inverness : the motion was more vertical than in any of the 

 preceding shocks ; there was a sharp and sudden upheaval, and then 

 the earth vibrated violently, but this succeeding tremor was not so 

 violent as that which succeeded the shock of Nov. 15. 



The vertical component of the motion was very perceptible at : 

 Aldourie, Balnafettack, Dores, and Inverness ; and at all these 

 places it was upward first and then downward. 



3. Inteyisity. — The intensity of the shock was VI. at Balnafettack, 

 Y. at Aldourie and Dores, and not less than IV. at Beauly, Clunes 

 station, and Inchbreen. 



4. Sound-phenomena. — At all the twelve places mentioned, except 

 Boleskinc and Cawdor, the sound is recorded as having been heard. 

 The sound-area was therefore probably coextensive with the dis- 

 turbed area. At Balnafettack and Dores the vibrations were felt 

 when the sound was loudest. At Brin and Inverness the sound 

 preceded, accompanied, and followed the shock ; at Bunchrew it was 

 heard before, but not after, the shock, all the other shocks at the 

 latter place having been both preceded and followed by sound. 



V. Doubtful Shocks. 



Nov. 15, IS** 25'", Clunes station. A shock similar to that felt at 

 IS'' 15"". 



Nov. 17, Inverness. A shock felt shortly after midnight. 



Nov. 17, 4'' 20'", Inverness. Three vibrations felt, but no sound 

 heard. 



Nov. 17, 4'' 30"\ Inverness. Two vibrations, each accompanied 

 by a sharp report. 



Nov. 19, 21'' 35'", Inverness. A slight tremor. 



Dec. 1, about 3'', Bunchrew. A slight shock. 



Dec. 3, 2'' 45'", Bunchrew. A slight shock. 



Dec. 6, J)'' 7"', Clachnaharry. No perceptible motion ; a noise 

 Q.J.G.S. No. 188. 2x 



