ON THE EARTHQUAKE AND VOLCANIC PHENOMENA OF JAPAN. 99 



2. Earthquake Frequency per Season. 



4. Sourly Frequency of Earthquakes. • 



The number of earthquakes in each hour during the year will be 

 found from the following table : — 



We see from the above that the maximum frequency was between 

 3-4 P.M. and 4-5 a.m., and the minimum between 8-9 p.m, 0-1 p.m., 7-8 

 P.M., 1-2 A.M., and 3-4 a.m. 



H 2 



