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  • Presentation | SA21A: Magnetosphere-Ionosphere-Thermosphere Coupling and Currents Across Regions and Scales II Oral
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  • SA21A-03: Five extreme storm time auroral electrojet events: Testing our understanding.
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Author(s):
Jesper Gjerloev, Johns Hopkins University Applied Physics Laboratory (First Author)
Shinichi Ohtani, JHU/APL (Presenting Author)
Ying Zou, The University of Alabama in Huntsville


We show 5 different extreme auroral electrojet events as identified in ground based magnetometer data. Abrupt and extreme variations of the ground level magnetic field are related to ground induced currents and have? disruptive space weather related societal implications. The underlying processes resulting in these events are a focus of the field due to at least three reasons: They serve as a test of our understanding of the underlying physics, they serve as an excellent means to test the capabilities of simulations, and, they are important for identifying societal impacts. In this paper we present 5 different extreme events, all occurring during storm time conditions. The characteristics of these events are different: ranging from very localized to global and occurring on the nightside as well as dayside. The underlying processes are likewise different, including externally driven by the solar wind and internal plasma sheet processes. We use a long list of ground based and space borne assets to characterize the events and to educate our interpretation of why they occurred. Three of the five events occurred during the May 2024 storm.



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