Specific features of sporadic structures in the ionospheric E region during strong geomagnetic disturbances of October 29-31, 2003, according to the Data of the Radar Instrumental Facility of the Institute of Solar-Terrestrial Physics, Russian Academ

摘要

The effects in the ionospheric E region recorded during the strong magnetic storm of October 29-31, 2003, are considered. In midlatitude Eastern Siberia, the storm resulted in the phenomena typical of the subpolar ionosphere: anomalous absorption, sharp decrease in the electron density, plasma instability in the lower ionosphere, and large spatial gradients of ionization. The ionospheric response to the magnetic storm in Irkutsk (52 degrees N, 104 degrees E) was studied at the radar instrumental facility of Institute of Solar-Terrestrial Physics, Siberian Division, Russian Academy of Sciences, including the DPS-4 digisonde, ionospheric chirp sounder, and incoherent scatter radar.