Fig. 2
From: Near-surface atmospheric electric field changes through magnetic clouds via coronal mass ejections
Hourly variation in the related physical parameters during the period of September 4th–10th, 2017 (cosmic ray intensity by the OULU neutron monitor (panel f, counts/s), Dst index (panel e, nT), interplanetary magnetic field magnitude IMF (panel a, nT), north‒south component of the interplanetary magnetic field Bz (panel b, nT), solar wind velocity V (panel c, km/s), and dawn–dusk electric field Ey (panel d, mV/m), S1 and S2 mean Shock1, Shock2)