“…It is well known that the thermal anisotropy of ring current 10-100 keV ions provides free energy for the EMIC wave instability. Plasma injected or transported into nightside of the inner magnetosphere (Dai et al, 2015(Dai et al, , 2014He et al, 2012He et al, , 2016He et al, , 2023Xiong et al, 2022) and pressure enhancement at dayside (Remya et al, 2015;Tsurutani et al, 2016) could both change the distribution of ring current. Substorm ion injections associated with H + -band EMIC waves at L between 5 and 6 have been studied (Jun et al, 2019;Kim et al, 2021;Remya et al, 2018], however the isolated ion injections during substorms have been rarely observed in the inner zone.…”