In the swmf-input folder,• The data provided in GaussCoeff.txt can be used to obtain the paleomagnetic intrinsic magnetic field during the inversion period through the spherical harmonic function.• The data provided in IMF_ideal.dat is used as the upstream solar wind input condition of SWMF.The mgt-3d-simu folder contains 3d magnetospheric simulation data at different times during the geomagnetic reversal.

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Electromagnetic ion cyclotron (EMIC) waves are transverse plasma waves generated in the equatorial magnetosphere by the anisotropic energetic proton instability (