Results 41 to 50 of about 9,553 (254)
The Growth and Decay of Individual Sunspots and Pores
The Astrophysical JournalAn analysis of the photometric growth and decay rates of sunspots and pores was carried out. According to the Solar Dynamics Observatory/Helioseismic and Magnetic Imager data for the period 2010 May–2025 March, ≈3.5 × 10 ^5 sunspots and pores were ...
Andrei G. Tlatov
doaj +1 more source
Flare forecasting using the evolution of McIntosh sunspot classifications
Journal of Space Weather and Space Climate, 2018 Most solar flares originate in sunspot groups, where magnetic field changes lead to energy build-up and release. However, few flare-forecasting methods use information of sunspot-group evolution, instead focusing on static point-in-time observations ...
McCloskey Aoife E. +2 more
doaj +1 more source
Complex Topology of the Magnetic Field in Strong Flares
, 2005 We report the "5+1" dynamical classification of the most frequently observed topologies of the magnetic field in sunspot groups associated with powerful flares.Comment: 2 pages, 1 figure, Proceedings of IAU Symp.
Ikhsanov, N. R. +2 more
core +1 more source
Advanced Science, EarlyView.This study reveals a citrate–ACLY–H3K27ac metabolic–epigenetic axis driving inflammatory gene activation and kidney fibrosis, highlighting ACLY inhibition as a potential therapeutic strategy for chronic kidney disease (CKD). ABSTRACT The mechanisms by which metabolic stress drives epigenetic dysregulation and fibrosis in chronic kidney disease (CKD ...
Chunxiu Du +15 more
wiley +1 more source
The Astronomical JournalThe relative sunspot number is one of the major parameters for the study of long-term solar activity. The automatic calculation of the relative sunspot number is more stable and accurate as compared to manual methods.
Cui Zhao +6 more
doaj +1 more source
Modeling the Sun's open magnetic flux and the heliospheric current sheet
, 2009 By coupling a solar surface flux transport model with an extrapolation of the heliospheric field, we simulate the evolution of the Sun's open magnetic flux and the heliospheric current sheet (HCS) based on observational data of sunspot groups since 1976.
Banaszkiewicz +14 more
core +1 more source
Long-Term Measurements of Sunspot Magnetic Tilt Angles [PDF]
, 2012 Tilt angles of close to 30,600 sunspots are determined using Mount Wilson daily averaged magnetograms taken from 1974 to 2012, and MDI/SoHO magnetograms taken from 1996 to 2010.
D'Silva +9 more
core +1 more source
Tests of Sunspot Number Sequences: 4. Discontinuities Around 1946 in Various Sunspot Number and Sunspot-Group-Number Reconstructions [PDF]
Solar Physics, 2016 In press with Solar ...
Lockwood, M., Owens, M. J., Barnard, L.
openaire +2 more sources
Beyond the Ban—Shedding Light on Smallholders' Price Vulnerability in Indonesia's Palm Oil Industry
Applied Economic Perspectives and Policy, EarlyView.ABSTRACT The Indonesian government imposed a palm oil export ban in April 2022 to address rising cooking oil prices. This study explores oil palm smallholders' vulnerability to the policy using descriptive statistics, Lasso, and post‐Lasso OLS regressions.
Charlotte‐Elena Reich +3 more
wiley +1 more source
Sunspot areas and tilt angles for solar cycles 7-10
, 2015 Extending the knowledge about the properties of solar cycles into the past is essential for understanding the solar dynamo. This paper aims at estimating areas of sunspots observed by Schwabe in 1825-1867 and at calculating the tilt angles of sunspot ...
Arlt, R. +4 more
core +1 more source