1.0- 3.D- 1.0- 5.0- 6.0- 7.0- 8.0- 9.0- 10.0- 11.0- 12.0- 14.0- 17.0- 

 2.9 3.9 4.9 5.9 6.9 7.9 8.9 9.9 10.9 11.9 13.9 16.9 LONGER 



PERIOD, SEC 

 a. 1981 



RNNUflL 80-81 



l.O- 3.0- 4.0- 5.0- 6.0- 7.0- 8.0- 9.0- lO.O- 11. 0- 12.0- 14.0- 17.0- 

 2.9 3.9 4.9 5.9 6.9 7.9 8.9 9.9 10.9 11.9 13.9 16.9 LONGER 

 PERIOD, SEC 



b. 1980 plus 1981 



Figure B20 . Annual peak spectral wave period 

 distribution for gage 620 



B84 



