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Symposium - International Astronomical Union, 1988 The 5 minute oscillations in a sunspot umbra are the response of the sunspot to forcing by the 5 minute p-modes in the surrounding convection zone (Thomas 1981). This interaction of solar p-modes with a sunspot can be used to probe the structure of a sunspot beneath the visible surface of the Sun (Thomas, Cram, and Nye 1982). Here we report briefly the
John H. Thomas +2 more
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Relationship between Solar Flux and Sunspot Activity Using Several Regression Models
JIF (Jurnal Ilmu Fisika), 2023 This study examines the correlation and prediction between sunspots and solar flux, two closely related factors associated with solar activity, covering the period from 2005 to 2022. The study utilizes a combination of linear regression analysis and the
Ruben Cornelius Siagian +6 more
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Sensors, 2021 Strong flares and coronal mass ejections (CMEs), launched from δ-sunspots, are the most catastrophic energy-releasing events in the solar system. The formations of δ-sunspots and relevant polarity inversion lines (PILs) are crucial for the understanding ...
Che-Jui Chang, Jean-Fu Kiang
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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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Vestnik KRAUNC: Fiziko-Matematičeskie Nauki, 2023 В статье проводится уточнение математической модели динамики солнечной активности методом решения обратной задачи. В качестве дополнительной информации используются экспериментальные данные по наблюдению за значениями числа Вольфа.
Твёрдый, Д.А. +1 more
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Introduction to Sunspots and Lotteries [PDF]
Journal of Economic Theory, 2002 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Edward C. Prescott, Karl Shell
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Journal of Water and Climate Change, 2023 The Haihe River basin is the main grain production base and the highland of economic strategic development in China. Based on daily meteorological data during 1960–2020, the characteristics of drought evolution in the Haihe River basin were analyzed by ...
Minhua Ling +4 more
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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
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Numerical simulations of sunspots [PDF]
, 2006 The origin, structure and evolution of sunspots are investigated using a numerical model. The compressible MHD equations are solved with physical parameter values that approximate the top layer of the solar convection zone.
Hurlburt, Neal +2 more
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, 2022 This paper shows that belief-driven economic fluctuations are a general feature of many determinate macroeconomic models. In environments with hidden state variables, forecast-model misspecification can break the link between indeterminacy and sunspots ...
Zhu, Mei +2 more
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