Equatorial trench at the magnetopause under saturation

Authors

  • A. Dmitriev,

    Corresponding author
    1. Institute of Space Science, National Central University, Chung-Li, Taiwan
    2. Institute of Nuclear Physics, Moscow State University, Moscow, Russia
    • Corresponding author: A. V. Dmitriev, Institute of Space Science, National Central University, Number 300, Jungda Rd., Chung-Li 320, Taiwan. (dalex@jupiter.ss.ncu.edu.tw)

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  • A. Suvorova

    1. Institute of Nuclear Physics, Moscow State University, Moscow, Russia
    2. Center for Space and Remote Sensing Research, National Central University, Chung-Li, Taiwan
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Abstract

[1] Magnetic data from GOES geosynchronous satellites were applied for statistical study of the low-latitude dayside magnetopause under a strong interplanetary magnetic field of southward orientation when the reconnection at the magnetopause was saturated. From minimum variance analysis, we determined the magnetopause orientation and compared it with predictions of a reference model. The magnetopause shape was found to be substantially distorted by a duskward shifting such that the nose region appeared in the postnoon sector. At equatorial latitudes, the shape of magnetopause was characterized by a prominent bluntness and by a trench formed in the postnoon sector. The origin of distortions was regarded in the context of the storm-time magnetospheric currents and the large-scale quasi-state reconnection at the dayside magnetopause.

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