The latitudinal and longitudinal variations of the disturbance ionospheric current including the effects of Prompt Penetration (PP) and Disturbance Dynamo (Ddyn) are investigated for during 12 geomagnetic storms from 15 geomagnetic stations along three longitudinal sectors at 70°E, 77°E, and 93°E, ranging from middle to equatorial latitudes in both hemispheres are analyzed. Our study reveals that
Figure: Schematic representation of Ddyn current during (a) local noon and (b) local midnight, respectively.
Bulusu, J., Archana, R. K., & Arora, K. (2020). Spatial variations in disturbance ionospheric currents—Inference from 12 geomagnetic storms. Journal of Geophysical Research: Space Physics, 125, e2019JA027718. https://doi.org/ 10.1029/2019JA027718