40 -i 



20- 



0- 

 40- 



20- 



0- 



o 



£ 20- 



o 

 o o- 



m- 40- 

 O 



o 



c 



CD 



=3 



cr 



Jan 



00 



Feb 



20- 



LJ= J 

 40- 



20- 



0- 

 40- 



20- 



WA 



Mar 

 Apr 



a 



May 



u 



Jun 



v\ 



0_ 



a izi i 



Jul 



Z2 



Aug 



Z2V11A 



dz}\ 



Sep 



Ld 



Oct 



J cz 



*? 



m 



4 



V\ 



m 



Nov 



71 



lAUzi^ 



/ aYa?=2Xz\ 



□ 0_ 



I 



Is 



Dec 



^ 



PI 



v\ 



□ IZI 



mw$k® 



T" " I ' ' f ' ' I" " I ' ' I ' ' I " " l ' ' I 1 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 B7. 1980-1987 monthly wave period distributions 

 for Gage 630 



B19 



