This study presents direct evidence that global-scale magnetosphere convection can be driven by dayside magnetic reconnection, challenging the traditional Dungey cycle model which relies on nightside reconnection. Using global magnetohydrodynamic (MHD) simulations and observational data, the researchers show that intensified magnetospheric convection and field-aligned currents progress from the dayside to the nightside within 10–20 minutes following a southward turning of the interplanetary magnetic field (IMF). Observational data also reveal enhancements in both magnetosphere convection and the ionosphere's two-cell convection. These findings suggest that dayside reconnection can drive magnetosphere convection independently of nightside reconnection, with implications for understanding the mechanisms behind planetary magnetosphere convection and the upcoming Solar-Wind-Magnetosphere-Ionosphere Link Explorer (SMILE) mission. The study highlights the role of Region 1 and Region 2 Birkeland field-aligned currents in the coupling between the ionosphere and magnetosphere. The results support the idea that dayside reconnection and nightside reconnection act as two independent drivers for magnetosphere convection. The study also shows that dayside-driven convection can occur without subsequent substorm expansion, indicating that enhanced magnetosphere convection does not always lead to substorm activity. The findings have important implications for understanding the dynamics of the solar wind-magnetosphere-ionosphere system and the role of the ionosphere in magnetosphere convection. The study uses global simulations and observations to demonstrate that dayside reconnection can drive magnetosphere convection, providing new insights into the mechanisms of planetary magnetosphere convection.This study presents direct evidence that global-scale magnetosphere convection can be driven by dayside magnetic reconnection, challenging the traditional Dungey cycle model which relies on nightside reconnection. Using global magnetohydrodynamic (MHD) simulations and observational data, the researchers show that intensified magnetospheric convection and field-aligned currents progress from the dayside to the nightside within 10–20 minutes following a southward turning of the interplanetary magnetic field (IMF). Observational data also reveal enhancements in both magnetosphere convection and the ionosphere's two-cell convection. These findings suggest that dayside reconnection can drive magnetosphere convection independently of nightside reconnection, with implications for understanding the mechanisms behind planetary magnetosphere convection and the upcoming Solar-Wind-Magnetosphere-Ionosphere Link Explorer (SMILE) mission. The study highlights the role of Region 1 and Region 2 Birkeland field-aligned currents in the coupling between the ionosphere and magnetosphere. The results support the idea that dayside reconnection and nightside reconnection act as two independent drivers for magnetosphere convection. The study also shows that dayside-driven convection can occur without subsequent substorm expansion, indicating that enhanced magnetosphere convection does not always lead to substorm activity. The findings have important implications for understanding the dynamics of the solar wind-magnetosphere-ionosphere system and the role of the ionosphere in magnetosphere convection. The study uses global simulations and observations to demonstrate that dayside reconnection can drive magnetosphere convection, providing new insights into the mechanisms of planetary magnetosphere convection.