Spotless days and geomagnetic index as the predictors of solar cycle 25
نویسندگان
چکیده
We study the sunspot activity in relation to spotless days (SLDs) during descending phase of solar cycles 11–24 predict amplitude cycle 25. For this purpose, addition SLD, we also consider geomagnetic (aa index) a given cycle. A very strong correlation SLD (0.68) and aa index (0.86) with maximum next has been estimated. The empirical relationship led us deduce 25 be 99.13± 14.97 104.23± 17.35 using index, respectively as predictors. Both predictors provide comparable for reveal that will weaker than 24. Further, is likely occur between February March 2024. While utilized extensively past, work establishes SLDs another potential candidate predicting characteristics
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ژورنال
عنوان ژورنال: Research in Astronomy and Astrophysics
سال: 2021
ISSN: ['1674-4527', '2397-6209']
DOI: https://doi.org/10.1088/1674-4527/21/9/215