Results 41 to 50 of about 19,888,299 (273)
Visualization of the challenges and limitations of the long-term sunspot number record [PDF]
Nature Astronomy, 2018 The solar cycle periodically reshapes the magnetic structure and radiative output of the Sun and determines its impact on the heliosphere roughly every 11 years.
A. Muñoz-Jaramillo, J. Vaquero
semanticscholar +1 more source
CORRELATION BETWEEN SUNSPOT NUMBER AND GEOMAGNETIC STORM [PDF]
, 2018 Among the space weather subjects of research, geomagnetic storm and its effects on space and ground-based technologies has been of great interest to space scientists.
Adebiyi, S.J. +4 more
core +2 more sources
Relation between Latitude-dependent Sunspot Data and Near-Earth Solar Wind Speed
The Astrophysical Journal, 2023 Solar wind is important for the space environment between the Sun and the Earth and varies with the sunspot cycle, which is influenced by solar internal dynamics.
Qirong Jiao +3 more
doaj +1 more source
Katsue Misawa's sunspot data: sunspot group number and individual sunspot number
, 2023 These files show Katsue Misawa's sunspot observations with her 3-inch rafractor telescope from 1921 to 1934.
早川, 尚志 +3 more
core +1 more source
A Model of Sunspot Number with a Modified Logistic Function [PDF]
Astrophysical Journal, 2018 Solar cycles are studied with the Version 2 monthly smoothed international sunspot number, the variations of which are found to be well represented by a modified logistic differential equation with four parameters: maximum cumulative sunspot number or ...
G. Qin, S.-S. Wu
semanticscholar +1 more source
Maximum Sunspot Numbers and Active Days [PDF]
Journal of Astronomy and Space Sciences, 2013 Parameters associated with solar minimum have been studied to relate them to solar activity at solar maximum so that one could possibly predict behaviors of an upcoming solar cycle.
Heon-Young Chang
doaj +1 more source
Extreme Value Theory Applied to the Millennial Sunspot Number Series [PDF]
, 2018 In this work, we use two decadal sunspot number series reconstructed from cosmogenic radionuclide data (14C in tree trunks, SN 14C, and 10Be in polar ice, SN 10Be) and the extreme value theory to study variability of solar activity during the last nine ...
F. Acero +4 more
semanticscholar +1 more source
Astrophysical Journal, 2021 Cornelis Tevel made sunspot observations during the period 1816–1836, including the Dalton Minimum. In this work, the first revision of these observations since Wolf incorporated them into his database is presented.
V. Carrasco
semanticscholar +1 more source
Quantitative Forecasting of Sunspot Numbers: Statistical Methods and Deep Learning Models [PDF]
EPJ Web of ConferencesForecasting sunspot numbers is fundamental for understanding solar variability and its implications for space weather. However, most existing studies predominantly rely on Total Sunspot Number (TSN), thereby neglecting hemispheric asymmetry and limiting ...
Singha Tiasha +3 more
doaj +1 more source
The Astrophysical Journal, 2023 We report on the annual variation of quiet-time suprathermal ion composition for C through Fe using Advanced Composition Explorer (ACE)/Ultra-Low Energy Isotope Spectrometer data over the energy range 0.3–1.28 MeV nuc ^−1 from 1998 through 2019, covering
B. L. Alterman +4 more
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