1915-16.] The Ochil Earthquakes of the Years 1900-1914. 271 
(81) 1909, October 22, 7.57 a.m. 
A shock (intensity 4), preceded and followed by a sound like that of a 
heavy body falling, felt at Airthrey. 
(82) 1909, October 22, 9.8 p.m. 
At Airthrey there were three concussions, separated by intervals of two 
and five seconds, preceded and followed by sounds like those of sharp 
explosions. 
(83) 1910, February 8, 9.33 a.m. 
A shock (intensity 4), felt at Airthrey, Bridge of Allan, Menstrie, and 
Red Carr. At Airthrey it consisted of two parts, separated by an interval 
of two seconds, the first part being the stronger. The sound resembled that 
of an explosion. 
(84) 1910, February 10, 9.30 a.m. 
A loud, rumbling noise, heard at Menstrie. 
(85) 1910, February 10, 9.50 a.m. 
A shock (intensity 4), felt at Airthrey, Bridge of Allan, and Menstrie. 
At Airthrey it consisted of two parts, separated by an interval of two 
seconds, the first part being the stronger. The sound resembled that of 
an explosion. 
(86) 1910, February 11, 10.55 p.m. 
A shock (intensity 4), consisting of a single series of vibrations, and 
accompanied by a sound like that of an explosion, was felt at Airthrey. 
(87) 1910, April 17, 1.45 a.m. 
A shock (intensity 4), consisting of a single series of vibrations, and 
accompanied by a sound like that of a heavy waggon passing, was felt at 
Airthrey. 
(88) 1910, May 19, 9.45 a.m. 
A bumping noise, as of a huge rock rolled over and over, heard at 
Menstrie. 
(89) 1910, May 20, 2.40 p.m. 
A shock (intensity 4), felt at Airthrey, Alva, and Menstrie. At Airthrey 
the sound, which preceded the shock, was compared to that of an explosion. 
(90) 1910, May 20, 2.50 p.m. . 
A shock (intensity 4), preceded by a sound like that of an explosion, 
was felt at Airthrey and Alva. 
