302 Dr. G. Davison — The Stafford Earthquakes of 1916. 

 II. — On the Stafford Earthquakes of January 14-15, 1910, and 



• ON THE KeLATIONS BETWEEN THE TwiN-EARTHQUAKES OF THE 



Midland Counties. 



By Charles Davison, Sc.D., F.G.S. 

 TIIHE strong shock of January 14, 1919, originated in a region from 

 J_ which earthquakes have been absent for many years, perhaps 

 for several centuries, and its interest is therefore increased by the 

 fact that it was a twin-earthquake, that is, one produced by a single 

 generative effort in two detached foci. 



There is no certain evidence of any fore-shock, and, so far as 

 I know, there was only one after-shock. 



