Shocks and their Geomagnetic Effects

Noé Lugaz; Charles J Farrugia; Reka M Winslow; Nathan Schwadron

Presentation information

[EE] Oral

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

[P-EM12] [EE] Space Weather, Space Climate, VarSITI

Mon. May 22, 2017 9:00 AM - 10:30 AM A01 (Tokyo Bay Makuhari Hall)

convener:Ryuho Kataoka(National Institute of Polar Research), Antti A Pulkkinen(NASA Goddard Space Flight Center), Kanya Kusano(Institute for Space-Earth Environmental Research, Nagoya University), Kazuo Shiokawa(Institute for Space-Earth Environmental Research, Nagoya University), Chairperson:Ryuho Kataoka(National Institute of Polar Research)

10:10 AM - 10:30 AM

[PEM12-05] Shocks and their Geomagnetic Effects

★Invited papers

*Noé Lugaz¹, Charles J Farrugia¹, Reka M Winslow¹, Nathan Schwadron¹ (1.University of New Hampshire Main Campus)

Keywords:Coronal Mass Ejections, Shocks, Geomagnetic response

Sheath regions behind fast forward shocks are second only to magnetic ejecta in driving intense geomagnetic storms at Earth. Fast-foward shocks also routinely compress Earth's dayside magnetosphere, sometimes resulting in loss of energetic particles in the outer radiation belt through magnetopause shadowing and large geo-electric fields associated with sudden impulse. Here, we discuss the importance of the upstream medium into which shocks propagate, and, in particular the propagation of shocks inside previous ejecta, in determining their geo-effective potential. We also analyze which types of shocks result in strong geo-electric fields.