TY - JOUR

T1 - IMPULSIVE RECONNECTION IN THE MAGNETOTAIL DURING SUBSTORM EXPANSION

AU - SERGEEV, VA

AU - SEMENOV, VS

AU - SIDNEVA, MV

PY - 1987/9

Y1 - 1987/9

N2 - Magnetic and electric field variations measured by the ISEE-1 spacecraft within the plasma sheet (PS) have been studied during the initial stage of a strong substorm event. A plasmoid structure was generated at the substorm onset and then passed tailwards removing most of the previously large northward magnetic flux closed across the equatorial plane. During the following 20 min, a few individual bursts of positive Ey and southward Bz field components were detected within the PS tailwards of the reconnection site simultaneously with Pi1 bursts in the conjugate sector of the auroral zone. No signatures of ejected or growing magnetic islands were found in association with these bursts. The details of these burst-like variations agree with those predicted by the transient reconnection model, which describes the propagation of the disturbance launched from the local reconnection region. It is concluded that the impulsive development of the expansion phase related phenomena shown by recent studies originates from

AB - Magnetic and electric field variations measured by the ISEE-1 spacecraft within the plasma sheet (PS) have been studied during the initial stage of a strong substorm event. A plasmoid structure was generated at the substorm onset and then passed tailwards removing most of the previously large northward magnetic flux closed across the equatorial plane. During the following 20 min, a few individual bursts of positive Ey and southward Bz field components were detected within the PS tailwards of the reconnection site simultaneously with Pi1 bursts in the conjugate sector of the auroral zone. No signatures of ejected or growing magnetic islands were found in association with these bursts. The details of these burst-like variations agree with those predicted by the transient reconnection model, which describes the propagation of the disturbance launched from the local reconnection region. It is concluded that the impulsive development of the expansion phase related phenomena shown by recent studies originates from

U2 - 10.1016/0032-0633(87)90026-2

DO - 10.1016/0032-0633(87)90026-2

M3 - статья

VL - 35

SP - 1199

EP - 1212

JO - Planetary and Space Science

JF - Planetary and Space Science

SN - 0032-0633

IS - 9

ER -