374 DR. CHARLES DAVISON ON THE [Aug. 1902, 
falling in 4, the fall of a heavy body in 7, explosions in 8, and to 
miscellaneous sounds in 6 per cent. 
The beginning of the sound preceded that of the shock in 60 per 
cent. of the records relating to this epoch, coincided with it in 36, 
and followed it in 4 per cent.; the epoch of maximum intensity of 
the sound preceded that of the shock in 25 per cent. of the records, 
and coincided with it in 75 per cent.; while the end of the sound 
preceded that of the shock in 11 per cent. of the records, coincided 
with it in 63, and followed it in 26 per cent. In 60 records, the 
time-relations of both terminal epochs are mentioned: in 48 per 
cent. of these, the duration of the sound is greater than that of the 
shock, in 35 per cent. equal to it, while in the remaining 17 per 
cent. the relative duration is doubtful. 
b. July 9th, about 4.26 p.m. 
Intensity, 4. Number of records 4, from 4 places. 
This earthquake was observed at Carlisle, Cummersdale, Rock- 
cliffe, and Wigton. The shock was slight, and lasted about 
2 seconds. At Rockcliffe it was accompanied by a noise like that 
of a heavy body falling; and at Wigton by a sound which resembled 
that of a passing traction-engine. The focus of this shock was 
evidently close to the northern end of the focus of the first and 
principal shock. 
c. July 9th, 4.45 p.m. 
Intensity, 4; centre of disturbed area, lat. 54° 40:2’ N., long. 3° 2:4’ W. 
Number of records 64, from 44 places ; and negative records from 59 places, 
Isoseismal lines and disturbed area.—The two dotted 
lines in the map (p. 372) refer to this earthquake. The inner line 
represents the isoseismal 4, but the course of the line is doubtful 
towards both east and west. As drawn, it is an’ elongated oval, 
37 miles long, 13 miles wide, and including about 380 square miles. 
The outer line, which forms the boundary of the disturbed area, 
is more accurately drawn. It is 51 miles long, 28 miles wide, and 
contains an area of 1130 square miles. The longer axis runs 
N. 4° E., and 8. 4° W., and the centre of the curve is 6 miles 
north-east of Keswick; but the epicentre probably lies a short dis- 
tance farther west. The position of the boundary with regard to 
the isoseismal 4 of the first shock (the distance between them being 
6 miles on the west, and 12 miles on the east, side) shows that it 
must coincide closely with an isoseismal of intensity slightly greater 
than 4 of that earthquake. 
Nature of the shock.—The shock was simpler in character, 
as well as much slighter, than the first. In all parts, there was a 
single series of vibrations, which gradually increased in intensity 
and then died away. There is no evidence of any discontinuity in 
