Results 81 to 90 of about 2,730 (182)

Solar Latitudinal Distribution of Solar Flares around the Sun and Their Association with Forbush Decreases during the Period of 1986 to 2003 [PDF]

open access: yesJournal of Sciences, Islamic Republic of Iran, 2005
Solar flare events of high importance were utilised to study solar latitudinal frequency distribution of the solar flares in northern and southern hemisphere for the solar cycle 22 to recent solar cycle 23.
doaj  

A Joint Microwave and Hard X-Ray Study toward Understanding the Transport of Accelerated Electrons During an Eruptive Solar Flare

open access: yesThe Astrophysical Journal
The standard flare model, despite its success, is limited in comprehensively explaining the various processes involving nonthermal particles. One such missing ingredient is a detailed understanding of the various processes involved during the transport ...
Surajit Mondal   +3 more
doaj   +1 more source

The Occurrence of Powerful Flares Stronger than X10 Class in Solar Cycles

open access: yesThe Astrophysical Journal Letters
Solar flares stronger than X10 (S-flares,  >X10) are the highest-class flares that significantly impact on the Sun's evolution and space weather. Based on observations of Geostationary Orbiting Environmental Satellites at soft X-ray wavelength and the ...
Baolin Tan   +3 more
doaj   +1 more source

First Quantitative Results on the Response of Green and Red Line Dayglow Emissions to Solar Flares of Different Magnitudes

open access: yesGeophysical Research Letters
Flares originate from the impulsive release of magnetic energy in the solar atmosphere. The rise in X‐ray flux enhances ionization/electron content in the upper atmosphere, modifying the photochemical and dynamical processes that govern the ionosphere ...
Komal, Duggirala Pallamraju
doaj   +1 more source

The Influence of Solar Source Information on Energy-dependent Solar Energetic Particle Flux and Timing Based on Solar Energetic Particle Events Observed over Four Solar Cycles

open access: yesThe Astrophysical Journal
This study is based on proton flux data from ESA’s Solar Energetic Particle Environment Modeling database, analyzing solar energetic particle (SEP) events observed near Earth from 1976 to 2017. We have matched these events with corresponding solar flares
Zhendi Huang   +4 more
doaj   +1 more source

Constraining the Mass Loss and the Kinetic Energy of Stellar Coronal Mass Ejections with Solar Far-ultraviolet Flares

open access: yesThe Astrophysical Journal
Stellar eruptive events, such as flares and coronal mass ejections (CMEs), can affect planetary habitability by disturbing the stability of their atmospheres.
Nuri Park   +2 more
doaj   +1 more source

Solar Flare Ion Temperatures

open access: yesThe Astrophysical Journal Letters
Abstract This Letter proposes that the ion temperature is several times the local electron temperature in the hot onset phase and in the above-the-loop region of solar flares. The Letter considers: the evidence of spectral line Doppler widths (“nonthermal” broadening); evidence for “universal” ion and electron temperature increase ...
Alexander J. B. Russell   +4 more
openaire   +3 more sources

Time-Series Feature Selection for Solar Flare Forecasting

open access: yesUniverse
Solar flares are significant occurrences in solar physics, impacting space weather and terrestrial technologies. Accurate classification of solar flares is essential for predicting space weather and minimizing potential disruptions to communication ...
Yagnashree Velanki   +3 more
doaj   +1 more source

Solar Flares Triggered by a Filament Peeling Process Revealed by High-resolution GST Hα Observations

open access: yesThe Astrophysical Journal Letters
The dynamic structures of solar filaments prior to solar flares provide important physical clues about the onset of solar eruptions. Observations of those structures under subarcsecond resolution with high cadence are rare.
Mia Mancuso   +3 more
doaj   +1 more source

The Role of Reconnection at Magnetic Separators in Complex Solar Flare Ribbons

open access: yesThe Astrophysical Journal
Solar flare ribbons, manifesting as transient brightenings in the chromosphere, are believed to trace the footpoints of magnetic field lines reconnecting higher in the solar atmosphere.
Graham Barnes, Karin Dissauer
doaj   +1 more source

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