Dr. C. Davison—British Earthquakes. old 
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Vil.—Taur British KartaHauakeEs oF THE YEARS 1908 anv 1909. 
By Cuaries Davison, 8c.D., F.G.S. 
INCE the Swansea earthquake of June 27, 1906, no strong shock 
has visited these islands, and, with one exception, all those felt 
in the years 1908 and 1909 were comparatively shght tremors. The 
list includes 36 earthquakes, all of them originating in Scotland. 
The most important were the Dunoon earthquake of July 3, 1908, 
and the Ochil earthquake of October 20, 1908, the latter being 
the strongest shock felt in that district during the present century, 
The remaining tremors occurred in the Ochil district, and the 
great majority of them would have remained entirely unknown to 
seismologists had it not been for the interest taken in them by 
Mr. W. HB. Lindsay and Mr. T. J. H. Drysdale of . Menstrie, 
Mr. J. Dempster of Airthrey, and Dr. W. L. Cunningham of Alva. 
To the courtesy of these gentlemen I am indebted for the principal 
materials of this paper. 
1-7. Ochil Karthquakes : January 19 — June 21, 1908. 
1. January 19, 1908: 1.27 a.m.—A distinct shock, felt at Menstrie. 
On February 9, 1908, at 4.6 a.m., a shock, stronger than the 
preceding, was felt at Menstrie, but only, so far as known, by one 
observer. . 
2. May 1, 1908: 6.54 p.m.—A shock of intensity 4 felt at 
Airthrey, Alva, Dunblane, Menstrie, and Tillicoultry. The shock 
consisted of one maximum, lasted two seconds, and was accompanied 
by a loud noise like a muffled explosion. 
3. May 2, 1908: 7.5 a.m.—A shock of intensity 4, and lasting 
three seconds, felt at Airthrey, Alva, and Menstrie. At Airthrey 
the shock consisted of two concussions, connected by tremors, the 
latter concussion being the stronger. ‘The shock was preceded, 
accompanied, and followed by a rumbling noise. 
4. May 10, 1908: 12.48 a.m,—A shock of intensity 4, and lasting 
about four seconds, felt at Airthrey, Alva, Menstrie, Tillicoultry, and 
Tullibody. At Airthrey and Menstrie the shock consisted of two 
concussions, the first being much the stronger at Airthrey, and of 
about the same intensity as the other at Menstrie. Each concussion 
was accompanied by a loud noise like an underground explosion. 
5. May 10,1908: 12.58 a.m.—A slighter shock than the preceding, 
but of intensity 4, felt at Airthrey, Alva, and Menstrie. At Airthrey 
the shock appeared to be single; at Menstrie it consisted of two bumps, 
the first probably the stronger. The shock was accompanied by a 
muffled sound like that of an explosion. 
6. June 21, 1908: 38 am.—A distinct single shock felt at Alva 
and Menstrie, and at the former place accompanied by a loud noise. 
7. June 21, 1908: 4,20 am.—A slight but distinct single shock, 
felt at Menstrie. 
8. Dunoon Earthquake: July 3, 1908. 
Time of occurrence, 6.15 a.m.; intensity 4; centre of disturbed 
area in lat. 56° 6:7’ N., long. 4° 56:5’ W.; number of records 70, 
from 15 places, and a negative record from 1 place. 
