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Earth, Planets and Space
Figure 1 | Earth, Planets and Space

Figure 1

From: Does the South Atlantic Anomaly influence the ionospheric Sq current system? Inferences from analysis of ground-based magnetic data

Figure 1

Location of observatory sites for the years 1990 and 2011. The observatories (black triangles) are plotted on top of the surface shell conductance map of (Manoj et al. 2006), which is used in the S3D method to correct for the ocean effect. Black lines show the minimum and maximum dip latitude (+6° and +60°, and −6° and −60°) in between which the mid-latitude observatories are located that were used to determine Sq current system. Top: year 1990 global map (left) with regional map of the AWAGS network (right). Bottom: year 2011 global map (left) with regional map of the South Atlantic (right).

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