Results 41 to 50 of about 3,439,333 (263)
Active Days around Solar Minimum and Solar Cycle Parameter
Journal of Astronomy and Space Sciences, 2021 Utilizing a new version of the sunspot number and group sunspot number dataset available since 2015, we have statistically studied the relationship between solar activity parameters describing solar cycles and the slope of the linear relationship ...
Heon-Young Chang
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How much more can sunspots tell us about the solar dynamo? [PDF]
, 2004 Sunspot observations inspired solar dynamo theory and continue to do so. Simply counting them established the sunspot cycle and its period. Latitudinal distributions introduced the tough constraint that the source of sunspots moves equator-ward as the ...
Norton, Aimee A. +5 more
core +8 more sources
Sunspot numbers: Implications on Eastern African rainfall
South African Journal of Science, 2014 Following NASA’s prediction of sunspot numbers for the current sunspot cycle, Cycle 24, we now include sunspot numbers as an explanatory variable in a statistical model. This model is based on fitting monthly rainfall values with factors and covariates
Francis Gachari +2 more
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Time variations of the ionosphere at the northern tropical crest of ionization at Phu Thuy, Vietnam [PDF]
Annales Geophysicae, 2011 This study is the first which gives the climatology of the ionosphere at the northern tropical crest of ionization in the Asian sector. We use the data from Phu Thuy station, in Vietnam, through three solar cycles (20, 21 and 22), showing the complete
H. Pham Thi Thu +3 more
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The phase relation between sunspot numbers and soft X-ray flares
, 2011 To better understand long-term flare activity, we present a statistical study on soft X-ray flares from May 1976 to May 2008. It is found that the smoothed monthly peak fluxes of C-class, M-class, and X-class flares have a very noticeable time lag of 13,
A. Antalová +28 more
core +1 more source
Economic Theory, 2003 This paper shows new properties about the equilibria of a stationary OG economy by establishing a connection between its stationary equilibria and those of a finite economy, with and without extrinsic uncertainty. Specifically, it shows the countability and local uniqueness with respect to the sup metric of the so-called sunspot cycles introduced here,
openaire +3 more sources
PROGNOSES AND ANOMALY OF 24TH CYCLE OF SOLAR ACTIVITY
Odessa Astronomical Publications, 2014 Development of solar activity in 24th cycle has specific peculiarity – non-monotonous increasing of solar activity on grown phase which occurs for 1/3 number of all cycles.
V. G. Lozitsky, V. M. Efimenko
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Maximum Coronal Mass Ejection Speed as an Indicator of Solar and Geomagnetic Activities
, 2011 We investigate the relationship between the monthly averaged maximal speeds of coronal mass ejections (CMEs), international sunspot number (ISSN), and the geomagnetic Dst and Ap indices covering the 1996-2008 time interval (solar cycle 23).
A. Kilcik +21 more
core +3 more sources
The lost sunspot cycle: Reanalysis of sunspot statistics [PDF]
Astronomy & Astrophysics, 2003 We have recently suggested that one low sunspot cycle was possibly lost in 1790s (Usoskin et al. 2001, A&A, 370, L31). In this paper we present the results of a rigorous statistical analysis of all available sunspot observations around the suggested additional cycle minimum in 1792-1793.
I. G. Usoskin +2 more
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The long sunspot cycle 23 predicts a significant temperature decrease in cycle 24 [PDF]
, 2012 Relations between the length of a sunspot cycle and the average temperature in the same and the next cycle are calculated for a number of meteorological stations in Norway and in the North Atlantic region. No significant trend is found between the length
J. Solheim, K. Stordahl, O. Humlum
semanticscholar +1 more source