40-. 



Jan 



Jul 



20- 



0- 

 40- 



20- 



s 



Feb 



Q 



&^ 



o 40- 



0) 





o 





<1) 



20 



1_ 





i^ 





~! 





o 





o 



n 



O 





w— 



40 



o 





>> 





o 





c 

 a) 



20 



13 





D" 





CD 





Mar 



Apr 



ED 



Q00 



40- 



20- 



0- 

 40- 



20- 



May 



v\ 



1 



v\ 



-A =, lzh 



1^000 



v\ 



LA 



XA 



% 



Hn 



XAU 



Q_ 



Aug 



Sep 



C2 



Oct 



_CZ 

 Nov 



71 



V\ 



[A 



Q 



Y/ 



1 



QalZl_ 



'dzilZ 



J = ra 



"1 







iz: 



Jun 



" \ 



-El 



F^^ 



F3 



^ 



^ 



rzn 



Dec 



fl ^F? 



n 



P^F^I? 



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 B6 . 1988 monthly wave period distributions for Gage 630 



B19 



