Results 21 to 30 of about 2,282,682 (263)

Magnetic Flux and Magnetic Nonpotentiality of Active Regions in Eruptive and Confined Solar Flares [PDF]

open access: yes, 2021
With the aim of understanding how the magnetic properties of active regions (ARs) control the eruptive character of solar flares, we analyze 719 flares of Geostationary Operational Environmental Satellite (GOES) class ≥C5.0 during 2010–2019. We carry out
Ting Li   +5 more
semanticscholar   +1 more source

Analysis of Ionospheric Disturbances during X-Class Solar Flares (2021-2022) Using GNSS Data and Wavelet Analysis

open access: yesRemote Sensing, 2023
The influence of solar activity on the ionosphere, a critical area of investigation due to its relevance to the Sun–Earth relationship, has been extensively examined through various methodologies.
Charbeth López-Urías   +3 more
semanticscholar   +1 more source

Omori’s Law in the Occurrence of Solar Flare : Approach of Hybrid Model [PDF]

open access: yesIranian Journal of Astronomy and Astrophysics, 2020
Solar flares are large-scale phenomena that have a significant effect on theEarth’s climate. Using the solar flare time series from January 1, 2006 to July 21, 2016,we develop a complex network for predicting solar flares.
Amin Najafi
doaj   +1 more source

The Variation of the X-ray Solar Flare’s Time Profile

open access: yesUniverse, 2022
We have studied the variation of the time profile of X-ray emission of solar flares that occurred during the second half of solar cycle 23 (SC 23) and for about the full solar cycle 24 (SC 24) (2002–2018). We define a new index, called the “ratio index” (
Ramy Mawad   +3 more
doaj   +1 more source

Statistical Study of GOES X-Ray Quasi-periodic Pulsations in Solar Flares [PDF]

open access: yesAstrophysical Journal, 2020
Small-amplitude quasi-periodic pulsations (QPPs) detected in soft X-ray emission are commonplace in many flares. To date, the underpinning processes resulting in the QPPs are unknown.
L. Hayes   +4 more
semanticscholar   +1 more source

Evolutionary Relationship between Sunspot Groups and Soft X-Ray Flares over Solar Cycles 21–25

open access: yesThe Astrophysical Journal, 2023
Studying the interaction between solar flares and sunspot groups (SGs) is crucial for understanding and predicting solar activity. We examined the distribution, correlation, and flaring rates in the northern and southern hemispheres to reveal the ...
Jiaqi Lin   +5 more
doaj   +1 more source

Probing the Physics of the Solar Atmosphere with the Multi-slit Solar Explorer (MUSE). II. Flares and Eruptions [PDF]

open access: yesAstrophysical Journal, 2021
Current state-of-the-art spectrographs cannot resolve the fundamental spatial (subarcseconds) and temporal (less than a few tens of seconds) scales of the coronal dynamics of solar flares and eruptive phenomena.
M. Cheung   +26 more
semanticscholar   +1 more source

Thermal-nonthermal energy partition in solar flares derived from X-ray, EUV, and bolometric observations [PDF]

open access: yesAstronomy & Astrophysics, 2020
Context. In solar flares, energy is released impulsively and is partly converted into thermal energy of hot plasmas and kinetic energy of accelerated nonthermal particles.
A. Warmuth, G. Mann
semanticscholar   +1 more source

Magnetic Flux of Active Regions Determining the Eruptive Character of Large Solar Flares [PDF]

open access: yesAstrophysical Journal, 2020
We establish the largest eruptive/confined flare database to date and analyze 322 flares of Geostationary Operational Environmental Satellite class M1.0 and larger that occurred during 2010–2019, i.e., almost spanning all of solar cycle 24.
Ting Li   +5 more
semanticscholar   +1 more source

LOW-POWER SOLAR FLARES OF OPTICAL AND X-RAY WAVELENGTHS FOR SOLAR CYCLES 21–24

open access: yesSolar-Terrestrial Physics, 2020
Using data obtained in optical and X-ray wavelengths, we have analyzed solar flare activity for cycles 21–24. Over the last three cycles, solar activity is shown to decrease significantly.
A.V. Borovik , A.A. Zhdanov
doaj   +1 more source

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