Vol. 58.] | INVERNESS EARTHQUAKE OF SEPTEMBER 1901. 385 
V. Arrer-SHocks. 
In the following catalogue are supplied records of 46 shocks and 
10 earth-sounds. Of these, 16 shocks and 1 earth-sound were 
noticed by several or many observers ; the remainder depend on the 
evidence of one person alone. The list, however, is obviously far 
from being complete. Thus, on September 18th, between the two 
prominent after-shocks at 3.56 and 9 a.m., there 1s only one record 
given below; but Mr. D. Munro informs me that he felt 18 slight 
shocks at Dochgarroch within the same interval. Several shocks 
were also felt at Dores, and many earth-sounds were heard at 
Bunchrew, besides those contained in the register; while one 
observer at Lochend (Aldourie) estimates the total number of 
shocks up to October 23rd at about 70. 
c. September 18th, about 1.35 a.m. 
Intensity, about 4; epicentre, lat. 57° 24:9’ N., long. 4° 16°8’ W. Number 
of records 7, from 7 places (Pl. XII). 
The boundary of the disturbed area is uncertain towards the 
west. It is probably, however, nearly circular in form, as repre- 
sented in Pl. XII, being 10} or 11 miles in diameter, and containing 
about 88 square miles. Its centre is about 12 miles south-east of 
Dochgarroch, and 11 miles on the south-east side of the fault-line. 
The shock was very slight, and the sound a low rumble like distant 
thunder. 
d. September 18th, about 2 a.m. 
Number of records 2, from 1 place. 
A slight shock, accompanied by a noise like distant thunder, was. 
felt at Glenmazeran, near Dalarossie, in the valley of the Findhorn. 
e. September 18th, about 2.30 a.m. 
‘ 
Number of records 2, from 2 places. 
A slight tremor was felt at Inverness and Abersky, and at the 
latter place was accompanied by a noise like that of a passing 
vehicle. 
f. September 18th, about 3 a.m. 
Number of records 2, from 2 places. 
A tremor only was observed by the engineer at the Inverness 
District Asylum (2 miles west-south-west of Inverness), and a 
slight rumbling at Aigas (near Beauly). 
g. September 18th, 3.56 a.m. 
_Intensity, not less than 5; centre of isoseismal 5, lat. 57° 25°3' N., long. 
4° 15°9' W. Number of records 90, from 43 places ; also 6 doubtful records 
from 5 other places (Pl. XII). 
This was clearly the strongest of the whole series of after-shocks, 
though it exceeded but slightly the shock felt twelve days later 
