40-i 



20- 



0- 1 

 40 



20- 



0- 1 



<D 

 O 

 c 20- 



i_ 



i_ 



=5 

 O 

 O 0- 



<+- 40-] 



o 



o 



c 



<D 



=5 

 CT 



Jan 



[Z2 



'',n 



00 



a 







Jul 



P 7 ! 



ra 0@[zrf00a0 



Feb 



VI 



VI 



0000000E] 



Mar 





Aug 



Sep 

 71 





0000 



20- 



LE 0^ 

 40-i 



20- 



J 

 40 



20- 



Apr 

 May 



Jun 



H 



400_j 



Oct 



V\ 



uMmmm 



pi 



E3 



Nov 



000000 



^M0 



017] 



^r^nm T 



Dec 



Zn 



^m^vM^vM 



^p- 



2 3 4 5 6 7 8 9 10 12 14 16 



2 3 4 5 6 7 8 9 10 12 14 16 

 Period, sec 



Period, sec 



Figure E7 . 1980-1991 monthly wave period distributions 

 for Gage 645 



E20 



