Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998jgr...10312103a&link_type=abstract
Journal of Geophysical Research, Volume 103, Issue A6, p. 12103-12109
Astronomy and Astrophysics
Astrophysics
36
Solar Physics, Astrophysics, And Astronomy: Corona
Scientific paper
A review of the solar and the geophysical data for the last 6 decades indicates the existence of a three-solar-activity-cycle quasi-periodicity in them. It is also present in other data sets extending over several centuries. A new cycle may have started after 1996. If true, cycle 23 will be more modest (à la cycle 17) with an annual mean sunspot number count of 119.3+/-30 at the maximum. This inference is in contrast to the predictions of some of the solar astronomers who are predicting a very active cycle 23 (à la cycle 19).
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