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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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Characterizing the Solar Activity Using the Visibility Graph Method [PDF]
Entropy, 2023 In this paper, the Sun and its behavior are studied by means of complex networks. The complex network was built using the Visibility Graph algorithm. This method maps time series into graphs in which every element of the time series is considered as a ...
Tomás Zurita-Valencia, Víctor Muñoz
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Penumbral Structure and Outflows in Simulated Sunspots
Science, 2009 Sunspots are concentrations of magnetic field on the visible solar surface that strongly affect the convective energy transport in their interior and surroundings. The filamentary outer regions (penumbrae) of sunspots show systematic radial outward flows
Cameron, R. H. +3 more
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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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Magnetic Structure of Sunspots
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 ...
Kiyoshi Ichimoto
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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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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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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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