The emergence of twisted flux tubes which can trigger flares may be another source of flare-associated variability of current helicity.We demorstrate the relevance of current helicity to the description of flare activity by compming its variation with that of shear angle in the active region AR ...
Solar Flares: M-class flares expected (probability >=50%) Geo-Disturbance: Minor storm expected (A>=30 or K=5) Solar Proton Event: Warning condition (activity levels expected to increase, (Comments issued on 02 Jan 2025, 1234UT)
The underlying physics is discussed and its relationship to solar flare theory is suggested 展开 关键词: Theoretical or Mathematical/ astrophysical plasma plasma waves solar flares/ ponderomotive effects Sun modified decay instability dynamics current-carrying plasmas intense Langmuir waves Zakharov equations ...
Astronomers reported an increase in solar flare activity that they thought would soon peak at historic levels. On Friday itself, when the first of the huge flares occurred, scientists again noted that this could mean unusual aurora occurrences. But those predictions were buried in news reports of...
Current sheet models of solar flares 来自 Semantic Scholar 喜欢 0 阅读量: 31 作者: ER Priest 摘要: Current sheets have been suggested as the site for flare energy release because they can convert magnetic energy very rapidly into both heat and directed plasma energy. Also they contain electric...
Impulsive phase of solar flares. I - Characteristics of high energy electrons The current investigation is part of a series of studies which analyze the general characteristics of the 'nonthermal' models. The results are presented of... J Leach,V Petrosian - 《Astrophysical Journal》 被引量: ...
We propose an accurate analytical model for the source of hard X-ray emission from a flare in the form of a "thick target" with a reverse current to explain the results of present-day observations of solar flares onboard the GOES, Hinode, RHESSI, and TRACE satellites. The model, one-dim...
The sequence of phenomena consisting of solar flares, coronal mass ejections (CMEs), auroral substorms, and geomagnetic storms is mostly a manifestation of electromagnetic energy dissipation. Thus, first of all, it is natural to consider each of them in terms of a sequence of power supply (dy...
Evidence for a periodicity about 155 +- 5 days in the production of energetic solar flares was reported in 1984 by Rieger et al. and Kiplinger et al. The d... RS Bogart,T Bai - 《Astrophysical Journal》 被引量: 126发表: 1986年 Solar EUV measurements at Venus based on photoelectron emi...
This was an M6.6-category flare. Find out more about the classification of solar flaresat this link at Spaceweather.com Another view from SDO of the flare. Credit: NASA/SDO A look at sunspot 1158 as of Feb. 14, 2011. This is the source of the recent activity on the Sun. Credit: ...