Browsing Department of Physics and Technology by Author "Ohtani, S."
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External and Internal Causes of the Stormtime Intensification of the Dawnside Westward Auroral Electrojet
Ohtani, S.; Sorathia, K.; Merkin, V.G.; Frey, H.U.; Gjerløv, Jesper (Journal article; Peer reviewed, 2023)The dawn-dusk asymmetry of magnetic depression is a characteristic feature of the storm main phase. Recently Ohtani (2021, https://doi.org/10.1029/2021JA029643) reported that its magnitude is correlated with the dawnside ... -
Simultaneous Development of Multiple Auroral Substorms: Double Auroral Bulge Formation
Ohtani, S.; Gjerløv, Jesper; McWilliams, Kathryn A.; Ruohoniemi, J. M.; Frey, Harald U. (Journal article; Peer reviewed, 2021)The expansion phase of auroral substorms is characterized by the formation of an auroral bulge, and it is generally considered that a single bulge forms following each substorm onset. However, we find that occasionally two ...