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Can Sunspot Activity Affect the Population Dynamics of Cotton Bollworm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae)? [PDF]
InsectsWhether there is a correlation between sunspots and an impact on insects has long been a subject of debate. As a worldwide pest, the cotton bollworm can feed on a variety of plants and cause great harm to agriculture.
Jian Huang, Xiaojun Wang
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Magnetic Structure of Sunspots [PDF]
Living Reviews in Solar Physics, 2011 In this review we give an overview about the current state-of-knowledge of the magnetic field in sunspots from an observational point of view. We start by offering a brief description of tools that are most commonly employed to infer the magnetic field ...
Juan M. Borrero, Kiyoshi Ichimoto
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Complex Network Study of Solar Magnetograms [PDF]
Entropy, 2022 In this paper, we study solar magnetic activity by means of a complex network approach. A complex network was built based on information on the space and time evolution of sunspots provided by image recognition algorithms on solar magnetograms taken ...
Víctor Muñoz, Eduardo Flández
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Geophysical Research Letters, 2018 It was suggested in a recent article that sunspots drive decadal variation in Amazon River flow. This conclusion was based on a novel time series decomposition method used to extract a decadal signal from the Amazon River record.
Jessica Baker +2 more
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Locally weighted regression for sunspots estimation and prediction [PDF]
المجلة العراقية للعلوم الاحصائية, 2022 Locally weighted regression (LOESS) is a modern non-parametric regression method designed for treating cases where classical procedures are not highly efficient or cannot applied efficiently.
Ibtehal Fadel, Muzahem Al-Hashimi
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Relations Among Sunspots, CMEs and Geomagnetic Storms in Solar Cycle 23 [PDF]
Journal of Astronomy and Space Sciences, 2009 We compare the relation among the annual distribution of sunspots: coronal mass ejections (CMEs) and geomagnetic storms and North-South asymmetry during solar cycle 23.
Su-Lyun Rho, Heon-Young Chang
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Investigation of the sunspots and GDP nexus: The case of Balkan countries [PDF]
Ekonomski Anali, 2023 The phenomenon known as sunspots refers to regions of the Sun’s photosphere that are darker than their surroundings because their surface temperature is lower.
Žmuk Berislav, Jošić Hrvoje
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SIPNet & SAHI: Multiscale Sunspot Extraction for High-Resolution Full Solar Images
Applied Sciences, 2023 Photospheric magnetic fields are manifested as sunspots, which cover various sizes over high-resolution, full-disk, solar continuum images. This paper proposes a novel deep learning method named SIPNet, which is designed to extract and segment multiscale
Dongxin Fan +5 more
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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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