[P-EM09] Dynamics of Magnetosphere and Ionosphere

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

*ALEXEI DMITRIEV^1,2、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)

キーワード：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.