Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pbeio..19...25w&link_type=abstract
Publications of the Beijing Astronomical Observatory, No. 19, p. 25 - 31
Astronomy and Astrophysics
Astronomy
Scientific paper
It is known that the earth environment is significantly affectd by solar activity. It is now in the maximum period of solar cycle 22. An analysis of the present solar activity and a forecast of the activity in the future part of the cycle would be of interest for the research of the earth environment where we live. Four properties of the solar activity in the ascending phase of cycle 22 are pointed out in the first section of the paper. They are: (1) the minimum of the sunspot number at the beginning of cycle 22 is the highest recorded, (2) the increase rate of the sunspot number of cycle 22 is very high, (3) the ascending phase of the cycle is very short and (4) there is a rather long plateau in the maximum phase of the sunspot number of the cycle. In the section second of the paper, a prediction of the solar activity of the cycle is given. About 3000 active regions, 40,000 solar flares, 200 X class X-ray bursts and 70 solar proton events could be observed in the descending phase.
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