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Stream interaction regions (SIRs) are created from the interaction between fast and slow interplanetary plasma. SIRs at 1 au can cause significant perturbations in geospace, including geomagnetic and ionospheric storms. In this paper we present a case study involving an additional structure in the solar wind before the typical SIR signatures. We find that this first preceding structure corresponds to the flank of an interplanetary coronal mass ejection while the second one is associated to an SIR. Both structures cause significant perturbations in the magnetosphere and ionosphere.

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Impact of Interplanetary Conditions on the Magnetosphere/ionosphere Produced by an ICME/SIR Double Structure

  • 会议论文

  • 出版模式：

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  • 发表日期：

    2026年

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  • Sergio Dasso,
  • María Graciela Molina,
  • Pascal Démoulin,
  • Noelia Ayelén Santos,
  • Christian Gutierrez,
  • Adriana María Gulisano

摘要

Stream interaction regions (SIRs) are created from the interaction between fast and slow interplanetary plasma. SIRs at 1 au can cause significant perturbations in geospace, including geomagnetic and ionospheric storms. In this paper we present a case study involving an additional structure in the solar wind before the typical SIR signatures. We find that this first preceding structure corresponds to the flank of an interplanetary coronal mass ejection while the second one is associated to an SIR. Both structures cause significant perturbations in the magnetosphere and ionosphere.