Evolutions of various solar indices around sunspot maximum and sunspot minimum years [PDF]
Annales Geophysicae, 2002 The smoothed monthly sunspot numbers showed that in many solar cycles, (a) during years around sunspot maxima, there was only one prominent maximum, but in some cycles there was a broad plateau. If the beginning and end of these are termed as first
R. P. Kane, R. P. Kane
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Magnetic Flux Emergence and Decay Rates for Preceder and Follower Sunspots Observed with HMI [PDF]
, 2017 We quantify the emergence and decay rates of preceder (p) and follower (f) sunspots within 10 active regions from 2010 to 2014 using Space-weather Helioseismic Magnetic Imager Active Region Patch data.
A. Norton +3 more
semanticscholar +1 more source
Super-strong Magnetic Field in Sunspots [PDF]
, 2017 Sunspots are the most notable structure on the solar surface with strong magnetic fields. The field is generally strongest in a dark area (umbra), but sometimes stronger fields are found in non-dark regions, such as a penumbra and a light bridge.
T. Okamoto, T. Sakurai
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Records of sunspots and aurora candidates in the Chinese official histories of the Yuán and Míng dynasties during 1261–1644 [PDF]
, 2017 Records of observations of sunspots and auroras in pre-telescopic historical documents provide useful information about past solar activity both in long-term trends and short-term space weather events.
H. Hayakawa +6 more
semanticscholar +1 more source
Multidecadal Cycles of the Climatic Index Atlantic Meridional Mode: Sunspots that Affect North and Northeast of Brazil [PDF]
Journal of Aerospace Technology and Management, 2020 Using the 1951-2017 historical series of the Atlantic Meridional Mode (AMM) index and the monthly number of sunspots, it was possible to observe a significant association between them.
Cleber Souza Correa +3 more
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The magnetic nature of umbra–penumbra boundary in sunspots [PDF]
, 2018 Context. Sunspots are the longest-known manifestation of solar activity, and their magnetic nature has been known for more than a century. Despite this, the boundary between umbrae and penumbrae, the two fundamental sunspot regions, has hitherto been ...
J. Jurvc'ak +4 more
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Automatic Recognition of Sunspots in HSOS Full-Disk Solar Images [PDF]
Publications Astronomical Society of Australia, 2016 A procedure is introduced to recognise sunspots automatically in solar full-disk photosphere images obtained from Huairou Solar Observing Station, National Astronomical Observatories of China. The images are first pre-processed through Gaussian algorithm.
Cui Zhao +3 more
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Emergence of Magnetic Flux Generated in a Solar Convective Dynamo. I. The Formation of Sunspots and Active Regions, and The Origin of Their Asymmetries [PDF]
, 2017 We present a realistic numerical model of sunspot and active region formation based on the emergence of flux bundles generated in a solar convective dynamo.
Feng Chen, M. Rempel, Yuhong Fan
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Functional sunspot equilibria [PDF]
Journal of Mathematical Economics, 2006 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
CHATTERJI, Shurojit +1 more
openaire +6 more sources
PENGEMBANGAN ALAT PERAGA BINTIK MATAHARI MENGGUNAKAN LED BERBASIS ARDUINO
Spektra: Jurnal Fisika dan Aplikasinya, 2017 Abstrak Bintik matahari yang terjadi dalam kehidupan sehari-hari merupakan hal menarik untuk divisualisasikan melalui alat peraga dalam proses belajar menganjar.
Yoky Novra Silta, Yudhiakto Pramudya
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