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A Simple Technique for Identifying the Propagation Direction of CMEs in 3D Space
Fainshtein, V. G.; Egorov, Y. I.
By now several methods have been proposed enabling to determine the kinematic characteristics of coronal mass ejections (CMEs) in 3D space. Many of these methods are based on using the triangulation technique and stereoscopic observations of the CMEs with two and more spacecraft. As a rule, these methods involve relatively complicated procedures. …
Nature and Variability of the Electron Velocity Distribution Functions and the Nonequilibrium Boltzmann Entropy in the Solar Wind at the First Lagrangian (L1) Point During the Halo CME Event on 25 July 2004
Nampoothiri, Govind G.; Thampi, R. Satheesh; Thampi, Smitha V. +2 more
In this paper, using the measurements at the Sun-Earth first Lagrangian point (L1), the kinetic properties of the electron velocity distribution functions (EVDFs) during the passage of a typical halo coronal mass ejection (CME) has been analyzed. This CME was a front-sided, full halo CME, which erupted on 25 July 2004 (Carrington rotation 2019) fr…
Origin of the Solar Rotation Harmonics Seen in the EUV and UV Irradiance
Giono, G.; Zender, J. J.; Kariyappa, R. +1 more
Long-term periodicities in the solar irradiance are often observed with periods proportional to the solar rotational period of 27 days. These periods are linked either to some internal mechanism in the Sun or said to be higher harmonics of the rotation without further discussion of their origin. In this article, the origin of the peaks in periodic…
Temporal and Spatial Association Between a Solar Flare, CME, and Radio Burst on 19 November 2013
Shanmugaraju, A.; Suresh, K.; Syed Ibrahim, M. +2 more
We present multi-wavelength and multi-instrument observations and analysis of a major X 1.0 class flare, radio burst, halo coronal mass ejection (CME), and loop eruption from the solar active region NOAA 11893 on 19 November 2013 (SOL2013-11-19T10:26). The aim of this work is twofold: The first aim to study the evolution of the loop eruption and t…
Aggregation Characteristics of the Sun's Large-Scale Magnetic Field Associated with a Global Magnetic Anomaly in the Last Extended Solar Cycle
Magara, Tetsuya; An, Junmo; Lee, Hwanhee +1 more
The solar cycle represents the Sun's periodically changing magnetic state, which is potentially subject to global magnetic anomalies emerging on it. What the characteristics are of the Sun's large-scale magnetic field playing roles in these anomalies is a key to clarifying how the Sun deviates from its normal magnetic state. This article reports a…