Results 211 to 220 of about 3,439,333 (263)

A Representation of the Sunspot Cycle*

Bell System Technical Journal, 1939
ALTHOUGH sunspots had been observed occasionally back to ancient times, their study may be said to date from their rediscovery by Galileo in the spring of 1610 with the then newly invented telescope. Since then much has been written about their nature, their periodicities and possible influence on human affairs.
openaire   +2 more sources

Periodicities in the sunspot cycle

Vistas in Astronomy, 1987
Abstract The existence of the eleven-year sunspot cycle has been known for many years. Since the first compilation of sunspot records, there has been sustained interest in detecting other periodicities in sunspot data. Statistical analyses of sunspot counts have indicated the presence of a number of different periodicities with wavelengths ranging ...
openaire   +1 more source

Pulsation, rotation and sunspot cycle

Solar Physics, 1977
A suggestion is made that the periods for solar pulsation, solar rotation, and sunspot cycle may be closely related one to another.
openaire   +1 more source

Randomness in Sunspot Number: A Clue to Predict Solar Cycle 25

Solar Physics, 2020
B. Kakad, Raj Kumar, A. Kakad
semanticscholar   +1 more source

Notes on the sunspot cycle

Journal of Geophysical Research, 1954
Indication that the long series of sunspot cycles is beginning to repeat itself within recorded data has renewed interest in the question of the components which are involved. One difficulty encountered in previous attempts at isolating the components has been in not basing the analysis on an integral number of cycles.
openaire   +1 more source

Sunspot cycle prediction using multivariate regression and binary mixture of Laplace distribution model

Proceedings of the Indian Academy of Sciences, Earth and Planetary Sciences, 2018
A. Sabarinath, A. K. Anilkumar
semanticscholar   +1 more source

Prediction of Future Sunspot Cycles

Nature, 1963
Attention is directed to a 7-cycle recurrence tendency in the rise-time of sunspots and to the possible use of this tendency in prediction. Rise-time values for each of the past 15 cycles are plotted against the year in which maximum sunspot activity occurred. Expressing rise-time as a fraction of the total cycle-length, values for the next two sunspot
openaire   +1 more source

SARS, MERS and the Sunspot Cycle

, 2017
Jiangwen Qu, C. Wickramasinghe
semanticscholar   +1 more source

Sunspots and Cycles: Reply

Southern Economic Journal, 1983
Richard G. Sheehan, Robin Grieves
openaire   +1 more source

Sunspots and Cycles: Comment

Southern Economic Journal, 1983
Nicholas R. Noble, T. Windsor Fields
openaire   +1 more source