Results 11 to 20 of about 986,682 (175)

Statistical properties of solar Hα flare activity [PDF]

open access: yesJournal of Space Weather and Space Climate, 2017
Magnetic field structures on the solar atmosphere are not symmetric distribution in the northern and southern hemispheres, which is an important aspect of quasi-cyclical evolution of magnetic activity indicators that are related to solar dynamo theories.
Deng Linhua   +3 more
doaj   +3 more sources

Topological structure of the magnetic solar corona [PDF]

open access: yes, 2007
The solar corona is a highly complex and active plasma environment, containing many exotic phenomena such as solar flares, coronal mass ejections, prominences, coronal loops, and bright points.
Maclean, Rhona Claire
core   +2 more sources

Solar flare particle acceleration in collapsing magnetic traps [PDF]

open access: yes, 2012
Electronic redacted version excludes material for which permission has not been granted by the rights holderThe topic of this thesis is a detailed investigation of different aspects of the particle acceleration mechanisms operating in Collapsing Magnetic
Grady, Keith J.
core   +2 more sources

Extreme ultraviolet imaging of three-dimensional magnetic reconnection in a solar eruption [PDF]

open access: yes, 2015
X.C., J.Q.S., M.D.D., Y.G., P.F.C. and C.F. are supported by NSFC through grants 11303016, 11373023, 11203014 and 11025314, and by NKBRSF through grants 2011CB811402 and 2014CB744203. C.E.P. and S.J.E. are supported by the UK STFC. J.Z.
Sun, J.Q.   +9 more
core   +1 more source

The investigation of quasi-separatrix layers in solar magnetic fields [PDF]

open access: yes, 2011
The structure of the magnetic field is often an important factor in many energetic processes in the solar corona. To determine the topology of the magnetic field features such as null points, separatrix surfaces, and separators must be found.
Restante, Anna Lisa
core   +2 more sources

Quasi-Periodic Pulsations in an M-Class Solar Flare

open access: yes, 2023
We have studied the quasi-periodic pulsations (QPPs) of the M2.3 flare that occurred in the active region NOAA 12172 on 23 September 2014. Through the fast Fourier transform (FFT) method, we decompose the flare light curves into fast- and slowly-varying ...
Jun Xu   +3 more
core   +1 more source

Diagnostics of the Solar X-Flare Impact on Lower Ionosphere through the VLF-NAA Signal Recordings

open access: yesOpen Astronomy, 2011
An analysis of four solar flare X-ray irradiance effects on VLF signal amplitude and phase delay variations on the NAA/24.0 kHz signal trace during the period from 2005 September to 2006 December was carried out.
Kolarski Aleksandra   +2 more
doaj   +1 more source

Solar–Stellar Connection: X-Ray Flares to Energetic (E > 10 MeV) Particle Events

open access: yesThe Astrophysical Journal, 2023
Energetic particle environments are an important factor for the viability of life on exoplanets surrounding flare stars. In the heliosphere, large gradual solar energetic ( E > 10 MeV) particle (SEP) events are produced by shocks from fast coronal mass ...
S. W. Kahler, A. G. Ling
doaj   +1 more source

The New Composite Solar Flare Index from Solar Cycle 17 to Cycle 24 (1937 – 2020)

open access: yes, 2022
The chromosphere is a highly dynamic outer plasma layer of the Sun. Its physical processes accounting for the variability are poorly understood. We reconstructed the solar chromospheric flare index (SFI) to study the solar chromospheric variability from ...
Acosta Jara, Jose Nemesio
core   +1 more source

THE PROCESSES OF ENERGY RELEASE IN LOW-POWER SOLAR FLARES

open access: yesSolar-Terrestrial Physics, 2019
Using flare patrol data for 1972–2010 [http://www.ngdc.noaa.gov/stp/space-weather/solar-data/solar-features/solar-flares/], we have conducted statistical studies of small solar flares.
Borovik A.V., Zhdanov A.A.
doaj   +1 more source

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