宇宙射线强度与地球磁场之间的关系：强烈和中等地磁暴期间的交叉小波分析

IF 2 3区物理与天体物理 Q3 PHYSICS, FLUIDS & PLASMAS

Physics of Plasmas Pub Date : 2024-09-04 DOI:10.1063/5.0201135

Chali Idosa Uga, Sujan Prasad Gautam, Binod Adhikari, Ashok Silwal, Ashutosh Giri

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引用次数: 0

摘要

本研究调查了 2017 年 9 月 8 日和 2018 年 8 月 26 日发生的两次强烈地磁暴以及 2020 年 2 月 18 日发生的一次中等强度地磁暴期间三个站点的宇宙射线强度（CRI）与地球磁场水平分量（dH）之间的关系：IRKT、YKTK 和 HRMS。这项研究结果表明，每个站点的 CRI 和 dH 并不表现出简单的关联。与其他两次风暴事件相比，2017 年 9 月 8 日强烈地磁暴期间，所有站点的 CRI 和 dH 都明显下降。与截止刚度较高的 HRMS（4.58 GV）和 IRKT（3.64 GV）站相比，截止刚度较低（1.65 GV）的 YKTK 站的下降更为明显。此外，交叉小波分析表明，CRI 与 dH 的关系随风暴强度、位置和台站的截断刚度而变化。

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Relationship between cosmic ray intensity and Earth's magnetic field: Cross-wavelet analysis during intense and moderate geomagnetic storms

This study investigated the relationship between the cosmic ray intensity (CRI) and the horizontal component of Earth's magnetic field (dH) during two intense geomagnetic storms that occurred on September 8, 2017, and August 26, 2018, and a moderate storm on February 18, 2020 over three stations: IRKT, YKTK, and HRMS. The findings of this study indicate that the CRI and dH do not exhibit a simple association over each station. A significant decrease in CRI and dH was seen during the intense geomagnetic storm on September 8, 2017, over all stations as compared to the other two storm events. The decrease was more pronounced over the YKTK station, which has low cutoff rigidity (1.65 GV), than the HRMS (4.58 GV) and IRKT (3.64 GV) stations with high cutoff rigidity. Furthermore, the cross-wavelet analysis reveals that the relationship between CRI and dH varies with the strength of the storm, the location, and the cutoff rigidity of the station.

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来源期刊

Physics of Plasmas 物理-物理：流体与等离子体

CiteScore

4.10

自引率

22.70%

发文量

653

审稿时长

2.5 months

期刊介绍： Physics of Plasmas (PoP), published by AIP Publishing in cooperation with the APS Division of Plasma Physics, is committed to the publication of original research in all areas of experimental and theoretical plasma physics. PoP publishes comprehensive and in-depth review manuscripts covering important areas of study and Special Topics highlighting new and cutting-edge developments in plasma physics. Every year a special issue publishes the invited and review papers from the most recent meeting of the APS Division of Plasma Physics. PoP covers a broad range of important research in this dynamic field, including: -Basic plasma phenomena, waves, instabilities -Nonlinear phenomena, turbulence, transport -Magnetically confined plasmas, heating, confinement -Inertially confined plasmas, high-energy density plasma science, warm dense matter -Ionospheric, solar-system, and astrophysical plasmas -Lasers, particle beams, accelerators, radiation generation -Radiation emission, absorption, and transport -Low-temperature plasmas, plasma applications, plasma sources, sheaths -Dusty plasmas