Fig. 10From: Simulation study of atmosphere–ionosphere variations driven by the eruption of Hunga Tonga-Hunga Ha’apai on 15 January 2022Global plots of the perturbation zonal electric field at an altitude of 200 km. a 5:00 UT, b 8:00 UT, c 11:00 UT, and d 14:00 UT. Positive sign (red) indicates eastward, and negative sign (blue) indicates westwardBack to article page