98 



Symposium on Microseisms 



Table 8 

 Typhoon Doris -- November 1949 



From these cases, it would appear that the 

 microseismic phenomenon usually recorded, is 

 essentially a dual one, with part of the effect 

 being the result of generation within the storm 

 and part as the result of secondary surf effects. 

 From the order of magnitude of response ob- 

 served on Guam, it appears further that the 

 surf effect is the dominant one having a magni- 

 tude at least twice that of the storm-induced 

 microseism. 



Despite the paucity of data available, it 

 seemed worthwhile to attempt to find some sort 

 of relationship between the various figures 

 available. One such attempt involved plotting 

 central wind intensity against microseismic 

 response for the three storms which showed 



c & 



f- X) 

 -O 94- 



oi o o 



-W — C J — IO- 



SwbLL Height (Gujim) 



MjjcrifKgH E( nfe it ud n n 7i< n va j 



Figure 1 



