Fig. 6From: Phase space representation of neutron monitor count rate and atmospheric electric field in relation to solar activity in cycles 21 and 22Phase space representation highlighting the short-term behavior at the solar maximum (red curve) and solar minimum (blue curve), against the long-term behavior (dashed curve), for: the sunspot area (upper panel), the neutron monitor count rate (middle panel), and the potential gradient (lower panel)Back to article page