Prediction of the strength and timing of sunspot cycle 25 reveal decadal-scale space environmental conditions. [PDF]
Nat Commun, 2018 The Sun’s activity cycle governs the radiation, particle and magnetic flux in the heliosphere creating hazardous space weather. Decadal-scale variations define space climate and force the Earth’s atmosphere.
Bhowmik P, Nandy D.
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Overlapping Magnetic Activity Cycles and the Sunspot Number: Forecasting Sunspot Cycle 25 Amplitude [PDF]
Solar Physics, 2020 AbstractThe Sun exhibits a well-observed modulation in the number of spots on its disk over a period of about 11 years. From the dawn of modern observational astronomy, sunspots have presented a challenge to understanding—their quasi-periodic variation in number, first noted 175 years ago, has stimulated community-wide interest to this day.
McIntosh, Scott W. +4 more
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Forecasting the number of sunspots for solar cycle 25 utilizing the facebook prophet model [PDF]
Scientific ReportsThe solar cycle, also referred to as the solar magnetic activity cycle, represents a nearly periodic change in solar activity occurring approximately every 11 years, as evidenced by the observation of sunspot numbers.
H. I. Abdel Rahman, W. A. Badawy
doaj +2 more sources
The Sunspot Cycle: Teacher's Guide [PDF]
, 2011 In this activity, students investigate the change in the number of sunspots over a period of time. They will discover the appearance, origins, and magnetic properties of sunspots.
core +2 more sources
The proposed “Waldmeier discontinuity”: How does it affect to sunspot cycle characteristics?
Journal of Space Weather and Space Climate, 2012 Recently, Svalgaard has proposed that Waldmeier introduced a discontinuity in the International Sunspot Number (ISN) around 1945. In this paper, we study some characteristics of the sunspot cycle using the classical ISN and the proposed version derived ...
Pérez Aparicio Alejandro Jesús +2 more
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Annals of Geophysics, 2009 Four well known geomagnetic classes of activity such as quiet days activity, fluctuating activity, recurrent activity<br />and shock activity time occurrences have been determined not only by using time profile of sunspot number<br />Rz but ...
Frédéric Ouattara
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Discovery of a relation between the decay rate of the Sun's magnetic dipole and the growth rate of the following sunspot cycle: a new precursor for solar cycle prediction [PDF]
, 2023 Sunspots have been observed for over four centuries and the magnetic nature of sunspot cycles has been known for about a century; however, some of its underlying physics still remain elusive. It is known that the solar magnetic cycle involves a recycling
Priyansh Jaswal, C. Saha, D. Nandy
semanticscholar +1 more source
Prediction of even and odd sunspot cycles
Journal of Space Weather and Space Climate, 2023 Here we study the prediction of even and odd numbered sunspot cycles separately, thereby taking into account the Hale cyclicity of solar magnetism. We first show that the temporal evolution and shape of all sunspot cycles are extremely well-described by ...
Asikainen Timo, Mantere Jani
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Progress in Solar Cycle Predictions: Sunspot Cycles 24–25 in Perspective [PDF]
Solar Physics, 2020 The dynamic activity of the Sun—sustained by a magnetohydrodynamic dynamo mechanism working in its interior—modulates the electromagnetic, particulate, and radiative environment in space.
D. Nandy
semanticscholar +1 more source
Deciphering solar magnetic activity: The (solar) hale cycle terminator of 2021
Frontiers in Astronomy and Space Sciences, 2023 We previously identified an event in the solar timeline that appeared to play a role in how sunspot Cycle 23 (SC23) transitioned into sunspot Cycle 24 (SC24). The timeframe for this transition was rapid, taking place over a very short time and perhaps in
Scott W. McIntosh +3 more
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