TEC Dynamics During the Intense Magnetic Storm

ΔTEC variations were studied during the magnetic storm on August 25-26, 2018 at three stations: Kiruna (Sweeden), Jozefoslaw (Poland) and Nicosia (Cyprus). The main phase of the storm caused the increase of TEC values at all stations but with different intensity of ΔTEC peak. Then the decrease of ΔTEC followed. The recovery phase of the storm marked clearly the transition from decrease to increase of ΔTEC at all three stations. It worth noting that though these common features were revealed, in general, ΔTEC behaviour had a complex character with the particular features at each station. TEC and foF2 behaviour were similar at high latitudes, when foF2 data was available.