Imaging the May 2024 Extreme Aurora With Ionospheric Total Electron Content

IF 4.6 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Geophysical Research Letters Pub Date : 2024-10-19 DOI:10.1029/2024gl111981

J. C. Foster, P. J. Erickson, Y. Nishimura, S. R. Zhang, D. C. Bush, A. J. Coster, P. E. Meade, E. Franco-Diaz

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Abstract

The continental United States is well instrumented with facilities for mid-latitude upper atmosphere research that operate on a continuous basis. In addition, citizen scientists provide a wealth of information when unusual events occur. We combine ionospheric total electron content (TEC) data from distributed arrays of GNSS receivers, magnetometer chains, and auroral observations obtained by citizen scientists, to provide a detailed view of the intense auroral breakup and westward surge occurring at the peak of the 10–11 May 2024 extreme geomagnetic storm. Over a 20-min interval, vertical TEC (vTEC) increased at unusually low latitude (∼45°) and rapidly expanded azimuthally across the continent. Individual receiver/satellite data sets indicate sharp bursts of greatly elevated of vTEC (∼50 TECu). Intense red aurora was co-located with the leading edge of the equatorward and westward TEC enhancements, indicating that the large TEC enhancement was created by extremely intense low-energy precipitation during the rapid substorm breakup.

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利用电离层总电子含量对 2024 年 5 月的极光进行成像

美国大陆中纬度高层大气研究设施完备，持续运行。此外，公民科学家在异常事件发生时也提供了大量信息。我们将全球导航卫星系统接收器分布式阵列提供的电离层电子总含量（TEC）数据、磁力计链和公民科学家获得的极光观测数据结合起来，详细描述了 2024 年 5 月 10-11 日极端地磁暴高峰期发生的强烈极光破裂和西向浪涌。在 20 分钟的时间间隔内，垂直 TEC（vTEC）在异常低的纬度（∼45°）上升，并迅速向整个大陆方位扩展。单个接收器/卫星数据集显示 vTEC 急剧上升（∼50 TECu）。强烈的红色极光与向赤道和向西的 TEC 增强的前缘位于同一位置，这表明大规模的 TEC 增强是由亚暴快速分裂过程中极其强烈的低能量降水造成的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Geophysical Research Letters 地学-地球科学综合

CiteScore

9.00

自引率

9.60%

发文量

1588

审稿时长

2.2 months

期刊介绍： Geophysical Research Letters (GRL) publishes high-impact, innovative, and timely research on major scientific advances in all the major geoscience disciplines. Papers are communications-length articles and should have broad and immediate implications in their discipline or across the geosciences. GRLmaintains the fastest turn-around of all high-impact publications in the geosciences and works closely with authors to ensure broad visibility of top papers.