SUX AND THE EARTH'S MAGNETIC FIELD FLEMIXG 



201 



S£PT£UBEH I 

 ll\ 12 



SOLAf>-rLA»€ tikis'" 



■Aocusr 30 



efso'i 



I^OO ^ 



1 30 ^ 



Aucusr 30 



AUGUST 31 



Figure 12.— (A) magnetograms, 10''13'°, August 30, to 10''09'", September 2, 1859 

 Kew Alaguetic Observatory, England, showing short bay disturbance caused 

 by ultraviolet light and beginning simultaneously with solar flare at ll^lo", 

 September 1, and beginning, 18 hours later, of great magnetic storm caused by 

 solar corpuscles. KB) solar sketch, September 1, 1859, by R. C. Carrington. 

 (After Balfour Stewart.) 



