Localized Increment and Decrement in the Total Electron Content of the Ionosphere as a Response to the April 20, 2018, Geomagnetic Storm

Figure 6

Shape of the VTEC for the 100°W meridian at 00:00 UT between April 19 and 23, 2018. A relevant range of geomagnetic latitudes is shown, 82.2°N - 65.9°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.