Japan Geoscience Union Meeting 2021

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[E] Oral

P (Space and Planetary Sciences ) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM09] Dynamics of Magnetosphere and Ionosphere

Sun. Jun 6, 2021 9:00 AM - 10:30 AM Ch.05 (Zoom Room 05)

convener:Akiko Fujimoto(Kyushu Institute of Technology), Mitsunori Ozaki(Faculty of Electrical and Computer Engineering, Institute of Science and Engineering, Kanazawa University), Yuka Sato(Nippon Institute of Technology), Aoi Nakamizo(Applied Electromagnetic Research Institute, National Institute of Information and Communications Technology), Chairperson:Hiroshi Hasegawa(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency), Masaki N Nishino(Japan Aerospace Exploration Agency, Institute of Space and Astronautical Science)

10:05 AM - 10:20 AM

[PEM09-06] Substorm-like events related to magnetosheath plasma jets

*ALEXEI DMITRIEV1,2, ALLA SUVOROVA2 (1.Institute of Space Science, National Central University, Jungli City, Taiwan, 2.Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia)

Keywords:substorms, auroral activity, magnetosheath plasma jets

Fast and dense streams of magnetosheath plasma, so-called jets, can hit the dayside magnetopause. The interaction results in a localized compression of the magnetosphere and sometimes penetration of the magnetosheath plasma inside the magnetosphere. These effects produce intensification of the geomagnetic activity at high-latitudes on dayside with further propagation of the disturbances toward night side. These, so-called substorm-like events can occur even during quite geomagnetic conditions under northward orientation of interplanetary magnetic field. We present examples of substorm-like events under various conditions.