High latitude pulsating aurorae
High latitude pulsating aurorae
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高纬度脉动极光
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
G. Burns
中科院分区：
文献类型：
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作者：
M. Craven;G. Burns
我们在这里报告的脉动极光的显着发生在高纬度午后极光椭圆。南极洲戴维斯的极光观测（Inv.南纬74.5度，地理78.0°E，68.6°S）的脉动极光活动表明，脉动极光活动在1330-1400磁地方时（MLT）的14.5%左右达到峰值。午后高纬度脉动极光通常是在558 nm处OI发射的1 kR背景上的小于250 R的增强。脉动周期往往在20-30秒，而平均极光区波动约为2-10秒。与极光带观测站类似，光涨落总是伴随着Pi（c）磁脉动。数据显示Kp和IMF趋势较弱。
We report here the significant occurrence of pulsating aurorae in the high latitude post-noon auroral oval. Observations of aurorae at Davis, Antarctica (Inv. 74.5°S, Geog. 78.0°E, 68.6°S) during the 1988 Austral winter indicate pulsating auroral activity peaks at around 14.5% in the period 1330–1400 magnetic local time (MLT). Post-noon high latitude pulsating aurora is typically a less than 250 R enhancement on a 1 kR background in the OI emission at 558 nm. Pulsation periods tend to be longer at 20–30 s compared to average auroral zone fluctuations of around 2–10 s. Similar to auroral zone stations, the optical fluctuations are always accompanied by Pi(c) magnetic pulsations. Weak Kp and IMF trends are present in the data.