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 4

Shape of the VTEC for the 58.5°E meridian at 10:00 UT between April 18 and 22, 2018. A relevant range of geomagnetic latitudes is shown, 67.4°N - 78.7°S (75°N - 75°S in geographic latitudes). The vertical red and black dashed lines indicate the magnetic equator and the equator (geographic latitude = 0°), respectively.