The electric current‐systems of magnetic storms

This paper continues my discussion of the average characteristics of the field of geomagnetic disturbances or storms, given in two previous papers 1 which will be referred to as 1 and 2 ; the irregular part of magnetic disturbance is not considered. A condensed representation of the main average features of magnetic storms is given in 1 (pp. 61–72) and 2 (pp. 242‐264), and evidence is described which supports the view that the type of the field remains fairly constant throughout a considerable range of intensity for the field as a whole.