Solar wind, geomagnetic conditions, and FACs associated with a solar wind HSS during 19–26 March 2017. From top to bottom, the panels are: (a) solar wind proton speed V_p, (b) proton density N_p (black, legend on the left) and ram pressure P_sw (red, legend on the right), (c) proton temperature T_p (black, legend on the left) and plasma-β (red, legend on the right), (d) interplanetary magnetic field (IMF) magnitude B₀, and B_x, B_y, and B_z components, (e) the Newell coupling function N_CF (black, legend on the left) and dayside magnetic reconnection rate Φ_D (red, legend on the right), (f) symmetric ring current index SYM-H, (g) westward auroral electrojet index SML (black, legend on the left) and number of substorm in each 3-h interval (red, legend on the right), and (h) total FAC intensity (FAC_T) in the northern hemisphere (NH; black) and southern hemisphere (SH; red). Vertical shading indicates a CIR.