1998/01/01 by L. R. Cander, Spomenko Mihajlović · 1 citation
Physics and Astronomy · Biochemistry, Genetics and Molecular Biology · #Ionosphere and magnetosphere dynamics #Geomagnetism and Paleomagnetism Studies #Solar and Space Plasma Dynamics #Ionosphere #Geomagnetic storm #Earth's magnetic field #Storm #Longitude #Middle latitudes #Geology #Critical frequency #Meteorology #Latitude #Atmospheric sciences #Geomagnetic latitude #Climatology #Geophysics #Geodesy #Geography #Physics #Magnetic field
paper · pdf · doi:10.1029/97ja02418
openalex publication_date 1998/01/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/23
Characteristics of midlatitude ionospheric disturbances during several great geomagnetic storms have been investigated using data from the European geomagnetic observatories and ionospheric stations with the aim of developing the local forecasting models, as part of the prediction and retrospective ionospheric modeling over Europe project. Based on the analysis of the geomagnetic storms of February 6, 1986, and March 13, 1989, a detailed picture of the local H component of geomagnetic field and the ionospheric critical frequency ƒ 0 F 2 variations is presented. The results show that ƒ 0 F 2 was dramatically changed above or below the monthly median level in a relatively narrow band about 15° of latitude and 30° longitude during the different phases of the storms. These results support the view that day‐to‐day F region ionospheric variability is essentially altered in great storms. Consequences of those effects for short‐term modeling purposes are discussed.