Analysis of ionospheric parameters during solar events and magnetic storms

• DOI

The paper presents a detailed analysis of the critical frequency data of the ionospheric F2 layer (foF2) during magnetic storms in 2022 and 2023. Events of different intensity that occurred during the winter period were analyzed. To investigate the foF2 temporal variations, we used the ionosonde data at Paratunka station (Kamchatka region), registered by IKIR FEB RAS. The analysis was performed using a generalized multicomponent model (GMCM) developed by the authors. The GMCM is based on the joint application of the wavelet transform, threshold functions, and ARIMA models. Application of the model allows us to detect anomalous changes in foF2 variations, to study their spectral-temporal structure, and to estimate their intensity. In the analyses we performed a comparison with the interplanetary medium parameters (IMF, solar wind), and we also took into account the geomagnetic disturbance power and the nature of its occurrence (CME, CIR, events of mixed nature). The study identifies the typical features of the ionospheric parameter dynamics during disturbed periods determined by space weather factors. The analysis shows that strong and moderate magnetic storms were preceded by positive pre-storm disturbances of foF2.

Mandrikova, O., Fetisova, N. Analysis of Ionospheric Parameters During Solar Events and Magnetic Storms. In: Solar-Terrestrial Relations and Physics of Earthquake Precursors. STRPEP 2023. Springer Proceedings in Earth and Environmental Sciences. Springer, Cham. https://doi.org/10.1007/978-3-031-50248-4_1