S320p.12 — Ionspheric and thermospheric response to the 27-28 February 2014 geomagnetic storm

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Aug 10th at 6:00 PM until 7:30 PM




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Author(s): Malki Khalifa2, Zouhair Benkhaldoun2, Nicole Vilmer1, Aziza Bounhir2, Jonathan J. Makela3, Mohamed Kaab2, Amine Lagheryeb2

Institution(s): 1. Observatoire de Paris, France, 2. Oukaimeden Observatory, Cadi Ayyad University, 3. University of Illinois at Urbana-Champaign, Illinois 61801, USA

The present work explores the ionospheric and thermospheric responses to the 27-28 February 2014 geomagnetic storm. This storm was consecutive to CME associated flares that occurred on 25 February. A Fabry Perrot interferometer provides measurements of the neutral winds and temperature based on the observations of the 630 nm redline emission and of a wide angle imaging system which records images of the 630 nm emission.
The effects of this geomagnetic storm on the thermosphere are evident from the clear departure of the winds and the temperature from their seasonal behavior. The effects on the ionosphere were also evident through the change observed in the background electric field as shown from the plasma bubbles drifts direction reversal. Attention was paid to the the interplanetary medium ; solar wind, interplanetary magnetic field, shock waves and geomagnetic indices. We also explore RHESSI data of the flare.