52 



Dr. C. Davison on Earthquake-Sounds. 



The dotted lines in fig. 2 bound the area (incomplete 

 towards the north) in which the destructive power of the 

 earthquake was greatest ; and within this area, again, the 

 undulating line shows the path of the great fault-scarp of 



Fi* 2, 



more than forty miles in length. It will be noticed that the 

 meizoseismal area is forked, the main branch proceeding 

 towards the south, and that the principal group of curves 

 follows this branch. The more northerly group of curves 

 also lies along the main meizoseismal area, while the third 

 group of curves lies roughly in the prolongation of the 

 easterly branch of the meizoseismal area. 



It will be seen in a later section that the sound in Japanese 

 earthquakes is only heard within a few miles from the origin. 

 Other conditions, then, being the same, it follows that super- 

 ficial earthquakes would have a greater chance of being 



