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Analysis of Cosmic Ray Fluxes at Different Stations during Geomagnetic Storms using Wavelet Based Approaches: Continuous Wavelet Transform and Multi-Resolution Analysis
Geomagnetism and Aeronomy ( IF 0.6 ) Pub Date : 2023-12-25 , DOI: 10.1134/s0016793223600418
Chali Idosa Uga , Binod Adhikari , Dessalegn Teferi

Abstract

This study investigated the impact of different types of geomagnetic storms on cosmic ray fluxes at different stations using various wavelet-based approaches such as continuous wavelet transformation (CWT) and multi-resolution analysis (MRA). We used the cosmic ray intensity data from the NAIN, INVK, OULU, and NEWK neutron monitor stations and solar-interplanetary activity data from the OMNI web data center for this study. We considered four different geomagnetic storm events: 23 June 2015, 13 October 2016, 8 September 2017, and 26 August 2018. The study revealed that the selected geomagnetic storms had a significant impact on cosmic ray fluxes and that the variations of cosmic ray fluxes differed throughout stations and events. The October 13, 2016, event showed a greater modulation of cosmic ray fluxes than the other three selected storms. Furthermore, the analysis shows the varying periodicity corresponding to cosmic ray fluctuations over different stations during the selected geomagnetic storms. This may be due to various factors, such as interplanetary magnetic field strength and orientation, observer location, and local magnetic fields. These findings provide insights into the effect on cosmic ray intensity at ground-based monitor stations due to geomagnetic storms and may serve as a reference for future studies.



中文翻译:

使用基于小波的方法分析地磁暴期间不同站点的宇宙射线通量:连续小波变换和多分辨率分析

摘要

本研究使用各种基于小波的方法(例如连续小波变换(CWT)和多分辨率分析(MRA))研究了不同类型的地磁暴对不同站点的宇宙射线通量的影响。我们在这项研究中使用了来自 NAIN、INVK、OULU 和 NEWK 中子监测站的宇宙射线强度数据以及来自 OMNI 网络数据中心的太阳行星际活动数据。我们考虑了四次不同的地磁暴事件:2015年6月23日、2016年10月13日、2017年9月8日和2018年8月26日。研究表明,所选的地磁暴对宇宙线通量有显着影响,并且宇宙线通量的变化不同。整个车站和活动。2016 年 10 月 13 日的事件显示出比其他三个选定风暴更大的宇宙射线通量调制。此外,分析显示了所选地磁暴期间不同站点上的宇宙射线波动对应的不同周期性。这可能是由于多种因素造成的,例如行星际磁场强度和方向、观察者位置和局部磁场。这些发现为了解地磁风暴对地面监测站宇宙射线强度的影响提供了见解,并可作为未来研究的参考。

更新日期:2023-12-26
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