Response of the midlatitude ionosphere to extreme geomagnetic storms of the 23rd solar cycle
Abstract
The ionospheric response in the Irkutsk region (52.3° N, 104.3° E) to the extreme geomagnetic storms of solar cycle 23 was studied based on the data of the Irkutsk incoherent scatter radar (ISR) and DPS-4 vertical sounding digital ionosonde. The deviations of parameters from the undisturbed level, i.e., from the monthly medians or the values obtained on a quiet day, were considered as an ionospheric response. Values of the electron concentration maximum ( N mF2) and electron temperature ( T e) at a height of 350 km were chosen as parameters. The ionospheric response is interpreted in the scope of the concept of a thermospheric storm and penetration of the magnetospheric electric field.
- Publication:
-
Geomagnetism and Aeronomy
- Pub Date:
- December 2009
- DOI:
- 10.1134/S0016793209080350
- Bibcode:
- 2009Ge&Ae..49.1218P