Results 11 to 20 of about 5,646,026 (251)
Statistics of sunspot group clusters [PDF]
Journal of Space Weather and Space Climate, 2013 The Zubrzycki method is utilized to find all sunspot groups which are close to each other during each Carrington rotation. The sunspot group areas and their positions for the years 1874–2008 are used.
Getko Ryszarda
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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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Differential Rotation for Different-sized Sunspot Groups Early Observed by the OGAUC
The Astrophysical Journal, 2023 Solar differential rotation is an important ingredient of the solar dynamo model, not only because the solar rotation profile is one of the key inputs in a solar dynamo model, but also because it imposes constraints for the solar dynamo model.
Miao Wan +3 more
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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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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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Lifetime of Long-Lived Sunspot Groups
UniverseStudies of active region (AR) lifetimes are mostly restricted to short-lived ARs. The aim of this paper is to include recurrent ARs, which should be identified unambiguously.
Judit Muraközy
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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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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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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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