40-| 



20- 





 40- 



20- 



Jan 



u 



B 



Jul 



' 



' \ 



®x>mM 









^ 



40 



q> 





u 





q) 



20 



i^ 





i~ 





-j 





O 





o 



n 



o 





M— 



40 



o 





>> 





o 







20 



3 





o 





CD 





Feb 



uWh 



Aug 



Q \22 C2 



Mar 







o_j 



Sep 



/ 



u 



n 



Q 



hqHh^HqHh^ 



Apr 



0- 1 — 



\2U^IZ 



Oct 



n 



Ld 







40- 



20- 



0- 

 40- 



20- 



May 



[3 



00 



[71 



Nov 



Jun 



-£?- 



P 



lAZ3\Z1 I a_a 



Dec 



am 



n 



M 



^ 



W^ 



i " " i ■ ' i ' ■ i " "i ■ ■ i ' • i " " i ' ' t ' ' i i — i - 



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



Period, sec 



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

 Period, sec 



Figure B6 . 1990 monthly wave period distributions for Gage 630 



B19 



