10.0- 11.0- 12.0- M.O- 17.0- 

 10.9 11.9 13.9 16.9 LONGER 



PERIOD, 5EC 

 1981 



Jf)N-MflR 80-81 

 fiPR-JUN 8Q-B1 

 JUL-SEP 80-81 

 OCT-DEC 80-81 



1.0- 

 2.9 



3.0- 

 3.9 



<.o- 



4.9 



5.0- 

 5.9 



6.0- 7.0- 8.0- 



6.9 7.9 8.9 



PERIOD, SEC 



9.0- 10.0- U.O- 12.0- H.O- 17.0- 

 9.9 10.9 11.9 13.9 16.9 LONGER 



b. 1980 plus 1981 



Figure B29 . Seasonal peak spectral wave 

 period distribution for gage 615 



BllO 



