40-1 



20- 



Jan 



0- 

 40- 



20- 



_ aQ 



ra __™ 



EZ1 



Jul 



&s 



40 



a)" 





u 





a) 



20 



i_ 





i^ 





-i 





o 





o 



n 



o 





s— 



40 



o 





>> 





u 





a) 



20 



~3 





CT~ 





q> 





It 







Feb 



_ m 00B 



Mar 



Q0i 



f 7 ! 



/ 



El 



0Q00 



Aug 



0_ 





Apr 



PI 



AYA — m 



40- 



20- 





 40-i 



20- 



May 



H0000HH0 



Sep 

 Oct 





Nov 



121 Gl =_ 



Q 



raw ^ 



Jun 



-=p 



£3 



130 



V\ 



A 



71 



■A 



a. 



-i — " i 1 ■ r ' ■ i " " i ' ' f ■ ■ i " " i ■ ■ f ■ — i — t- — i— 

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



Dec 



PI 



^ 



H 



_ I — "| r i i 



P 







M 



Period, sec 



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

 Period, sec 



Figure C6 . 1991 monthly wave period distributions for Gage 111 



C19 



