Research Article
Localized Increment and Decrement in the Total Electron Content of the Ionosphere as a Response to the April 20, 2018, Geomagnetic Storm
Figure 5
Left column: differential VTEC maps between April 20, 2018 (22:00 UT) and April 21, 2018 (04:00 UT). Right column: GIMs between April 20, 2018 (22:00 UT), and April 21, 2018 (04:00 UT).