Fig. 4From: The nighttime ionospheric response and occurrence of equatorial plasma irregularities during geomagnetic storms: a case study(a and c) The geographic longitude versus UTC and (b and d) MLAT versus UTC distributions of small-scale plasma irregularities observed by the Swarm satellites during geomagnetic storms on (a and b) 6–11 September 2017 and (c and d) 24–29 August 2018. The results from Swarm A, B, and C are marked with red, green, and blue colors. For the left side panels, each circle represents one equatorial orbital segment of Swarm with small-scale (less than 300 km) plasma irregularities detectedBack to article page