Multiple conjugate observations of magnetospheric fast flow bursts using THEMIS observations

Abstract. Magnetotail earthward fast flow bursts can transport most magnetic flux and energy into the inner magnetosphere. These are generally an order of magnitude higher than typical convection speeds that azimuthally localised (1–3 RE) flanked by plasma vortices, which map to ionospheric vortices same sense rotation. This study uses a multipoint analysis conjugate magnetospheric observations investigate responses associated with both substorms pseudobreakups. We in detail what properties control differences magnetosphere–ionosphere between substorm pseudobreakup events, how these lead different responses. The events were observed Time History Events Macroscale Interaction during Substorms (THEMIS), while primary made all-sky cameras magnetometer-based equivalent currents. selected when satellites at least 6 RE from Earth radial distance local time (MLT) region ± 5 h midnight. results show magnetosphere ionosphere much stronger more structured compared pseudobreakups, likely be localised, transient weak tail is for strong weaker events. Blobe decreases significantly curvature force density pseudobreakups smaller indicating may not able penetrate deep association help us activity ground data.