Download original image
Maps for the winter anomaly intensity in TEC for quiet geomagnetic conditions (a–c) and for a moderate geomagnetic disturbance (3 < K p ≤ 6, K p-1 ≤ 3; d–f) at different levels of solar activity: −90 s.f.u. (a, d), −120 s.f.u. (b, e),−200 s.f.u. (c, f). Panels (g–i) show the longitudinal variations in the TEC winter anomaly intensity averaged in the 40–60° geographic latitude bands for quiet (solid lines) and disturbed (dashed lines) geomagnetic conditions. White domains on panels (a–f) correspond to the regions, for which the winter/summer ratio is less than 1. Bold gray curves (a–f) are the geomagnetic equator and ±15° geomagnetic latitudes.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.