scholarly journals Photometric and Statistical Analysis of Solar Energetic Particle (SEP) for the Peak of Solar Cycle 24

2016 ◽  
Vol 06 (03) ◽  
pp. 276-287
Author(s):  
Wafaa Zaki ◽  
Atheer Zidane ◽  
Amjad Al-Sawad
Keyword(s):  
Statistical Analysis ◽  
Solar Cycle ◽  
Energetic Particle ◽  
Solar Energetic Particle ◽  
Solar Cycle 24 ◽  
Cycle 24

Solar flares, CMEs and solar energetic particle events during solar cycle 24

2018 ◽  
Vol 61 (2) ◽  
pp. 777-785 ◽  
Author(s):  
Bimal Pande ◽  
Seema Pande ◽  
Ramesh Chandra ◽  
Mahesh Chandra Mathpal
Keyword(s):  
Solar Cycle ◽  
Solar Flares ◽  
Energetic Particle ◽  
Solar Energetic Particle ◽  
Solar Energetic Particle Events ◽  
Solar Cycle 24 ◽  
Cycle 24

3He rich periods measured by the Suprathermal Ion Telescope (SIT) on STEREO-A during solar cycle 24

2021 ◽  
Author(s):  
Marlon Köberle ◽  
Radoslav Bucik ◽  
Nina Dresing ◽  
Bernd Heber ◽  
Andreas Klassen ◽  
...  
Keyword(s):  
Solar Cycle ◽  
Heavy Ions ◽  
Energetic Particle ◽  
Solar Energetic Particle ◽  
Detection Algorithm ◽  
Solar Cycle 24 ◽  
Time Periods ◽  
Cycle 24 ◽  
Automatic Detection Algorithm

<p><sup>3</sup>He-rich solar energetic particle (SEP) events are characterized by a peculiar elemental composition with rare species like <sup>3</sup>He or ultra-heavy ions tremendously enhanced over the solar system abundances.<br>We report on <sup>3</sup>He rich SEP periods measured by the Suprathermal Ion Telescope (SIT) onboard STEREO-A beginning in 2007 until 2020, covering the whole solar cycle 24.<br>The mass resolution capabilities of SIT do not allow to easily distinguish between <sup>3</sup>He and <sup>4</sup>He especially in cases of a low <sup>3</sup>He to <sup>4</sup>He ratio.<br>We therefore developed a semi-automatic detection algorithm to find time periods during which a <sup>3</sup>He enhancement can be statistically determined.<br>Using this method we found 112 <sup>3</sup>He rich periods.<br>These periods were further examined in regards of their <sup>3</sup>He/<sup>4</sup>He and Fe/O ratio. <br>Previously about ten <sup>3</sup>He-rich SEP periods measured by SIT on STEREO-A have been reported.<br>An association with in-situ electron measurements by STEREO-SEPT and STEREO-STE showed that ~60% of the 112 periods are accompanied with electron events.<br>The here presented catalogue of <sup>3</sup>He rich periods is intended to serve as a reference for the community.</p>

scholarly journals SOLAR SOURCES OF3He-RICH SOLAR ENERGETIC PARTICLE EVENTS IN SOLAR CYCLE 24

2015 ◽  
Vol 806 (2) ◽  
pp. 235 ◽  
Author(s):  
Nariaki V. Nitta ◽  
Glenn M. Mason ◽  
Linghua Wang ◽  
Christina M. S. Cohen ◽  
Mark E. Wiedenbeck
Keyword(s):  
Solar Cycle ◽  
Energetic Particle ◽  
Solar Energetic Particle ◽  
Solar Energetic Particle Events ◽  
Solar Cycle 24 ◽  
Cycle 24

scholarly journals Observations of the longitudinal spread of solar energetic particle events in solar cycle 24

2012 ◽  
Author(s):  
C.M.S. Cohen ◽  
G.M. Mason ◽  
M.E. Wiedenbeck ◽  
D.K. Haggerty ◽  
R. Gomez-Herrero ◽  
...  
Keyword(s):  
Solar Cycle ◽  
Energetic Particle ◽  
Solar Energetic Particle ◽  
Solar Energetic Particle Events ◽  
Solar Cycle 24 ◽  
Cycle 24

Statistical Analysis of the Orbital Motion of Selected Artificial Earth Satellites during Solar Cycle 24

2021 ◽  
Vol 37 (6) ◽  
pp. 310-325
Author(s):  
A. I. Bilinsky ◽  
O. A. Baran ◽  
M. I. Stodilka ◽  
Ye. B. Vovchyk ◽  
M. M. Koval’chuk
Keyword(s):  
Statistical Analysis ◽  
Solar Cycle ◽  
Orbital Motion ◽  
Artificial Earth Satellites ◽  
Solar Cycle 24 ◽  
Artificial Earth ◽  
Cycle 24

scholarly journals Earth-affecting solar transients: a review of progresses in solar cycle 24

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Jie Zhang ◽  
Manuela Temmer ◽  
Nat Gopalswamy ◽  
Olga Malandraki ◽  
Nariaki V. Nitta ◽  
...  
Keyword(s):  
Solar Cycle ◽  
Solar Energetic Particle ◽  
Space Environment ◽  
Energy Output ◽  
Human Society ◽  
The Sun ◽  
Efficient Manner ◽  
Solar Cycle 24 ◽  
Interaction Regions ◽  
Cycle 24

AbstractThis review article summarizes the advancement in the studies of Earth-affecting solar transients in the last decade that encompasses most of solar cycle 24. It is a part of the effort of the International Study of Earth-affecting Solar Transients (ISEST) project, sponsored by the SCOSTEP/VarSITI program (2014–2018). The Sun-Earth is an integrated physical system in which the space environment of the Earth sustains continuous influence from mass, magnetic field, and radiation energy output of the Sun in varying timescales from minutes to millennium. This article addresses short timescale events, from minutes to days that directly cause transient disturbances in the Earth’s space environment and generate intense adverse effects on advanced technological systems of human society. Such transient events largely fall into the following four types: (1) solar flares, (2) coronal mass ejections (CMEs) including their interplanetary counterparts ICMEs, (3) solar energetic particle (SEP) events, and (4) stream interaction regions (SIRs) including corotating interaction regions (CIRs). In the last decade, the unprecedented multi-viewpoint observations of the Sun from space, enabled by STEREO Ahead/Behind spacecraft in combination with a suite of observatories along the Sun-Earth lines, have provided much more accurate and global measurements of the size, speed, propagation direction, and morphology of CMEs in both 3D and over a large volume in the heliosphere. Many CMEs, fast ones, in particular, can be clearly characterized as a two-front (shock front plus ejecta front) and three-part (bright ejecta front, dark cavity, and bright core) structure. Drag-based kinematic models of CMEs are developed to interpret CME propagation in the heliosphere and are applied to predict their arrival times at 1 AU in an efficient manner. Several advanced MHD models have been developed to simulate realistic CME events from the initiation on the Sun until their arrival at 1 AU. Much progress has been made on detailed kinematic and dynamic behaviors of CMEs, including non-radial motion, rotation and deformation of CMEs, CME-CME interaction, and stealth CMEs and problematic ICMEs. The knowledge about SEPs has also been significantly improved. An outlook of how to address critical issues related to Earth-affecting solar transients concludes this article.

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