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Space Physics

Rob Miles1
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TRACERS Reveals IMF-Driven Reconnection Geometry as Primary Driver of Storm-Time Cusp Morphology

Using multi-crossing low-altitude ion and electron measurements from the TRACERS mission during the 30 September 2025 geomagnetic storm, this study traces cusp precipitation evolution across storm phases and links observed morphological changes directly to IMF-driven dayside reconnection geometry. T…