Fig. 8
From: Inverting magnetic meridian data using nonlinear optimization
North polar view of AMPERE field-aligned current density in μA/m2, scale at right saturating from red to white, and from blue to black for values off scale, at 20:53 UT on January 15, 2010 (time shown by vertical bar in Fig. 7). The magnetic local time (MLT) is shown around the edge and with radial lines, and geomagnetic latitude lines are at 85 °, 80 °, 70 °, 60 °, and 55 ° (outer boundary)