Large Displacements of Conjugate Auroras in the Midnight Sector
Large Displacements of Conjugate Auroras in the Midnight Sector
复制标题
午夜区域共轭极光的大位移
DOI：
10.5636/jgg.48.967
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
T. Yoshino
中科院分区：
文献类型：
--
作者：
Hirokazu Minatoya;N. Sato;T. Saemundsson;T. Yoshino
1991年9月9日至10日，在冰岛的Husafell和南极洲的Syowa和Asuka三个近地磁共轭站同时获得了电视摄像机数据。在两个南部车站中，Syowa更接近Husafell。在南极洲有两个观测站，南共轭区的视野在极光高度纵向延伸到1 600公里，从而有可能研究极光共轭的空间特征。在研究共轭区极光形状和强度的相关性时，在午夜扇区的地磁恢复阶段发现了一个有趣的事件。在这次事件中，Husafell和Asuka之间保持了良好的相关性，而Husafell和Syowa之间不存在相关性，这表明共轭极光的纵向位移很大（500-800 km）。分析了产生纵向位移的原因。
Simultaneous TV camera data were obtained at three nearly geomagnetic-conjugate stations: Husafell in Iceland, and Syowa and Asuka in Antarctica, on September 9-10 in 1991. Of the two southern stations, Syowa is more nearly conjugate to Husafell. With two stations in the Antarctica, the field of view in the southern conjugate area extends longitudinally to ∼ 1600 km at auroral heights, making it possible to investigate the spatial characteristics of auroral conjugacy. When the correlation of auroral shape and intensity between conjugate areas was examined, an interesting event was discovered in the geomagnetic recovery phase in the midnight sector. During this event, good correlation was maintained between Husafell and Asuka while no correlation existed between Husafell and Syowa, suggesting a large (500-800 km) longitudinal displacement of conjugate auroras. The cause of the longitudinal displacement is discussed.