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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Are repetitive particle injections during high-speed solar wind streams classic substorms
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Are repetitive particle injections during high-speed solar wind streams classic substorms

机译：重复的粒子注射在吗高速太阳风流经典的亚暴的

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The relation between substorm occurrences, energetic particle injections, and High-Intensity Long-Duration Continuous AE Activity (HILDCAA) events has been an issue. To understand their relationship, we use global auroral images from the Wideband Imaging Camera (WIC) on the Imager for Magnetopause-to-Aurora Global Exploration (IMAGE) spacecraft to investigate auroral activity near the times of repetitive particle injections that occur every ～0.5 to 4 h during HILDCAA events. For the examined HILDCAA intervals during January–July 2003, we identified a total of 481 injection events. Good WIC imaging was available for 121 of these and showed substorm onset brightenings for a significant fraction of the 121 injections. Specifically, excluding 16 injections with ambiguous timings owing to the lack of a near-midnight spacecraft, we find that 93 of 105 injections (～88%) occurred within ±5 min of a substorm auroral onset. If we include cases with up to 10-min timing difference, the percentage becomes 97%. These results indicate that a significant fraction of HILDCAA-time repetitive particle injections are substorm-associated and thus suggest that substorms are a major component of HILDCAA geomagnetic activity and a possible contributor to the sustained small negative Dst during these periods.
机译：亚暴事件之间的关系,高能粒子注射和高强度长时间连续AE活动(HILDCAA)事件一直是一个问题。关系,我们使用全局极光图像宽带成像相机(WIC)成像Magnetopause-to-Aurora全球勘探(图片)航天器调查极光活动重复次附近的粒子注射,每0.5 ~ 4 h在发生HILDCAA事件。间隔1至2003年期间,我们确认共有481名注射事件。用于121和显示吗亚暴出现明亮的重要分数的121注射。不包括16注射用模棱两可的计时由于缺乏一个临近午夜航天器,我们发现93的105注射(~ 88%)发生的±5分钟内亚暴极光出现。包括例10分钟时间区别,变成了97%。结果表明,一个重要的部分HILDCAA-time粒子注射是重复的substorm-associated因此建议HILDCAA亚暴的主要组成部分地磁活动和一个可能的因素持续的小- Dst在这些期。

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