Table 3. Modes of oscillation of the Great Lakes ^. 







Period (hr) 





Mode^ 



Michigan 



Superior 



Erie 



Ontario 



IL 



9.0 



7.8 



14.4 



4.9 



2L 



5.3 



4.8 



9.1 



2.9 



3L 



3.5 



3.6 



5,8 



2.4 



4L 



3.0 



7 



4.1 



1.6 



5L 



2.5 



3.0 



3.6 



1.37 



6L 



1.85 



2.2 



3.0 



1.25 



7L 



1.58 



1.7 



2.5 



0.9 



8L 



1.44 



1.5 



2.2 



0.85 



9L 



1.25 



1.2 



2.0 



3 



lOL 







1.14 



1.8 







IT 



2.2 









2T 



1.1 









? 



0.97 



0.95 



1.2 





? 



0.85 



0.66 to 0.68 



0.92 





? 



0.65 



0.58 



0.69 





? 





0.52 to 0.53 



0.54 





? 





0.49 







^Observed, computed by Fee (1968) program and Rockwell 

 (1966) data, and compiled from many sources. 



^L = longitudinal, T = transverse; ? = other observed 

 periods, mode unknown. Two-dimensional modes are not 

 considered. 



^ Value unknown. 



38 



