Results 11 to 20 of about 917 (261)
Solar-Terrestrial Physics, 2016 This paper considers a longitude distribution of sunspot groups over 1982–2013, using data from the National Geophysical Data Center (Boulder, USA).
Rybak A.L.
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On the size distribution of sunspot groups in the Greenwich sunspot record 1874–1976 [PDF]
Astronomy & Astrophysics, 2005 accepted by A& ...
Baumann, I., Solanki, S.
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Solar flare forecasting using morphological properties of sunspot groups
Journal of Space Weather and Space Climate, 2019 We describe a new tool developed for solar flare forecasting on the base of some sunspot group properties. Assuming that the flare frequency follows the Poisson statistics, this tool uses a database containing the morphological characteristics of the ...
Falco Mariachiara +2 more
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PRE-FLARE DYNAMICS OF SUNSPOT GROUPS [PDF]
The Astrophysical Journal, 2014 Several papers provide evidences that the most probable sites of flare onset are the regions of high horizontal magnetic field gradients in solar active regions. Besides the localization of flare producing areas the present work intends to reveal the characteristic temporal variations in these regions prior to flares.
Korsós, Marianna Brigitta +2 more
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Automatic Detection of Magnetic δ $\delta$ in Sunspot Groups [PDF]
Solar Physics, 2015 14 pages, 5 figures, accepted for publication in ...
Padinhatteeri, Sreejith +3 more
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Deep Learning for Automatic Recognition of Magnetic Type in Sunspot Groups
Advances in Astronomy, 2019 Sunspots are darker areas on the Sun’s photosphere and most of solar eruptions occur in complex sunspot groups. The Mount Wilson classification scheme describes the spatial distribution of magnetic polarities in sunspot groups, which plays an important ...
Yuanhui Fang, Yanmei Cui, Xianzhi Ao
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Flare forecasting using the evolution of McIntosh sunspot classifications [PDF]
Journal of Space Weather and Space Climate, 2018 Most solar flares originate in sunspot groups, where magnetic field changes lead to energy build-up and release. However, few flare-forecasting methods use information of sunspot-group evolution, instead focusing on static point-in-time observations ...
McCloskey Aoife E. +2 more
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Flaring Rates and the Evolution of Sunspot Groups
, 2015 Solar flares are known to originate in sunspot groups, with increasingly complex magnetic structure leading to more frequent occurrence and often larger magnitude flares. Previously, McIntosh white-light classifications of sunspot groups and their historical flare rates have been used to calculate Poisson probabilities for flare forecasting.
McCloskey, Aoife +2 more
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SOLAR STORM TYPE CLASSIFICATION USING PROBABILISTIC NEURAL NETWORK COMPARED WITH THE SELF-ORGANIZING MAP [PDF]
Jurnal Ilmiah Kursor: Menuju Solusi Teknologi Informasi, 2012 Salah satu tugas LAPAN adalah melakukan pengamatan dan peramalan gangguan badai matahari. Gangguan ini dapat mempengaruhi medan elektromagnet bumi sehingga mengacaukan peralatan elektronik dan navigasi yang ada di bumi.
Gregorius S. Budhi +3 more
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Wings of the butterfly: Sunspot groups for 1826–2015 [PDF]
Astronomy & Astrophysics, 2017 The spatio-temporal evolution of sunspot activity, the so-called Maunder butterfly diagram, has been continously available since 1874 using data from the Royal Greenwich Observatory, extended by SOON network data after 1976.
R. Leussu +6 more
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