TABLE I 



GAMMA RANGES FOR K-INDICES 



Fredericksburg and Hartland Magnetic Observatories 



K-INDEX 



GAMMA RANGES 







0-5 



1 



5-10 



2 



10-20 



3 



20-40 



4 



40-70 



5 



70-120 



6 



120-200 



7 



200-330 



8 



330-500 



9 



500 -Up 



