Midlatitude Plasma Blob-like Structures Along With Super Equatorial Plasma Bubbles During the May 2024 Great Geomagnetic Storm

IF 4.6 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Geophysical Research Letters Pub Date : 2024-10-29 DOI:10.1029/2024GL111638

Wenjie Sun, Guozhu Li, Biqiang Zhao, Shun-Rong Zhang, Yuichi Otsuka, Lianhuan Hu, Guofeng Dai, Xiukuan Zhao, Haiyong Xie, Yi Li, Jianfei Liu, Yu Li, Baiqi Ning, Libo Liu, Atsuki Shinbori, Michi Nishioka, Septi Perwitasari

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Abstract

Plasma blob is generally a low-latitude phenomenon occurring at the poleward edge of equatorial plasma bubble (EPB) during post-sunset periods. Here we report a case of midlatitude ionospheric plasma blob-like structures occurring along with super EPBs over East Asia around sunrise during the May 2024 great geomagnetic storm. Interestingly, the blob-like structures appeared at both the poleward and westward edges of EPBs, reached up to 40°N magnetic latitudes, and migrated westward several thousand kilometers together with the bubble. The total electron content (TEC) inside the blob-like structures was enhanced by ∼50 TEC units relative to the ambient ionosphere. The blob-like structure at the EPB poleward edge could be partly linked with field-aligned plasma accumulation due to poleward development of bubble. For the blob-like structure at the EPB west side, one possible mechanism is that it was formed and enhanced accompanying the bubble evolution and westward drift.

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2024 年 5 月地磁大风暴期间的中纬度等离子体 Blob 样结构与超赤道等离子体气泡

等离子体球一般是一种低纬度现象，发生在日落后赤道等离子体泡（EPB）的极边。在此，我们报告了 2024 年 5 月大地磁风暴期间东亚日出前后中纬度电离层等离子体球状结构与超级等离子体泡同时出现的情况。有趣的是，等离子体球状结构同时出现在EPB的极向和西向边缘，最高可达40°N磁纬，并与气泡一起向西迁移了数千公里。相对于环境电离层，球泡状结构内部的总电子含量（TEC）增强了 50 个 TEC 单位。EPB极向边缘的球状结构可能部分与气泡极向发展导致的场对准等离子体积累有关。至于 EPB 西侧的球状结构，一种可能的机制是它是伴随着气泡的演化和向西漂移而形成和增强的。

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.