Evidence for a flux transfer event generated by multiple X-line reconnection at the magnetopause

摘要: [1] Magnetic flux transfer events (FTEs) are signatures of unsteady magnetic reconnection, often observed at planetary magnetopauses. Their generation mechanism, a key ingredient determining how they regulate the solar wind energy into magnetospheres, is still largely unknown. We report THEMIS spacecraft observations on 2007-06-14 an FTE generated by multiple X-line reconnection dayside magnetopause. The evidence consists (1) two oppositely-directed ion jets converging toward that was slowly moving southward, (2) cross-section core being elongated along magnetopause normal, probably squeezed jets, and (3) bidirectional field-aligned fluxes energetic electrons in magnetosheath, indicating both sides FTE. agree well with global magnetohydrodynamic model under large geomagnetic dipole tilt, which implies efficiency transport magnetotail lower for larger tilt.