Comparison of Ionospheric Responses in America Induced by Different Geomagnetic Storms in 2015

Yang Liu, Kunlin Yang

Abstract: The variability of the ionosphere is closely dependent on the solar and geomagnetic activities during geomagnetic storms. The ionosphere varies greatly compared to its quiet time behaviors. Several geomagnetic storms occur during the solar cycle 24, and some of which typically demonstrate the varied responses of the ionosphere. In this work, two strong geomagnetic storms in solar cycle 24 are selected, to study the different ionospheric responses in the America. Using the Continuous Operation Reference System (CORS), Global Navigation Satellite System (GNSS) data and observed disturbance storm-time (Dst) index, the TEC (Total Electron Content) and ROTI (Rate of TEC) responses during the main phases are investigated in detail. Positive responses are noted at all two cases. The intensive ROTI enhancements indicate that the generated large-scale ionospheric irregularities, in a spatial scale of several thousands of kilometers. Blob-like structures are found at the recovery phase of the storm event on March 2015, locating at 100°W70°W, 25°N-45°N.
Published in: Proceedings of the 36th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2023)
September 11 - 15, 2023
Hyatt Regency Denver
Denver, Colorado
Pages: 4002 - 4015
Cite this article: Liu, Yang, Yang, Kunlin, "Comparison of Ionospheric Responses in America Induced by Different Geomagnetic Storms in 2015," Proceedings of the 36th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2023), Denver, Colorado, September 2023, pp. 4002-4015. https://doi.org/10.33012/2023.19473
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