Fig. 6From: Observations of high-latitude geomagnetic field fluctuations during St. Patrick’s Day storm: Swarm and SuperDARN measurementsPolar view maps. Polar view maps of the local Hurst exponent values in the Northern Hemisphere for the time interval 14–22 March 2015. The coordinates are AACGM latitude, from \(50^{\circ }\)N to the north pole, and the magnetic local time (MLT), with the local noon at the top and local midnight at the bottom. Concentric circles are magnetic parallels drown at \(10^{\circ }\). On each map, the temporal trend of AE index for the corresponding day is reported using the same scale in all the graphs Back to article page