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Observation and Numerical Simulation of Cavity Mode Oscillations Excited by an Interplanetary Shock

Cavity mode oscillations (CMOs) are basic magnetohydrodynamic eigenmodes in the magnetosphere predicted by theory and are expected to occur following the arrival of an interplanetary shock. However, observational studies of shock-induced CMOs have been sparse. We present a case study of a dayside ultra-low-frequency (ULF) wave event that exhibited CMO properties. The event occurred immediately following the arrival of an interplanetary shock at 0829 UT on 15 August 2015. The shock was observed in the solar wind by the Time H ...

Takahashi, Kazue; Lysak, Robert; Vellante, Massimo; Kletzing, Craig; Hartinger, Michael; Smith, Charles;

YEAR: 2018     DOI: 10.1002/2017JA024639

Cavity mode oscillations; interplanetary shock; Van Allen Probes