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发表刊物：Journal of High Energy Astrophysics
关键字：South Atlantic Anomaly, Westward drift,Northward drift
摘要：Using the particle monitors aboard Insight-HXMT satellite, we analyzed over 6.5 years of continuous data to study the South Atlantic Anomaly (SAA) position, average count rate, and surface size, as well as its evolution from June 2017 to March 2024. We confirm the anti-correlation between the particle count rate obtained by particle monitors and the solar activity, as well as the anti-correlation between the evolution of the SAA surface size and the solar activity. Furthermore, this study confirms earlier measurements of a westward drift of the SAA with a rate of 0.343 ± 0.002deg/yr in longitude. However, it reveals a smaller northward drift with a rate of 0.028 ±0.002deg/yr in latitude. Two irregular drifts both in longitude and latitude were observed. We suggest that the irregular drifts may be not driven by solar cycle variation of the atmosphere but may be associated with geomagnetic jerks.
合写作者：Li Liu-Yuan+++
第一作者：Zhao Hai-Sheng+++
论文类型：期刊论文
一级学科：地球物理学
文献类型：期刊
卷号：44
页面范围：187–193
是否译文：否
发表时间：2024-10-01
收录刊物：SCI
发布期刊链接：https://www.sciencedirect.com/science/article/pii/S2214404824000958?dgcid=author