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- Title
Long-term variations of solar magnetic fields derived from geomagnetic data.
- Authors
Georgieva, K.; Kirov, B.; Nagovitsyn, Yu. A.
- Abstract
There are limited homogeneous instrumental observations of the sunspot magnetic fields, but the Earth is a sort of a probe reacting to interplanetary disturbances which are manifestation of the solar magnetic fields. We find correlations between some parameters of geomagnetic activity (the geomagnetic activity “floor”—the minimum value under which the geomagnetic activity cannot fall in a sunspot cycle, and the rate of increase of the geomagnetic activity with increasing sunspot number), and sunspot magnetic fields (the sunspot magnetic field in the cycle minimum, and the rate of increase of the sunspot magnetic field from cycle minimum to cycle maximum). Based on these correlations we are able to reconstruct the sunspot magnetic fields in sunspot minima and maxima since sunspot cycle 9 (mid 19th century).
- Subjects
SOLAR magnetic fields; CLIMATE change; GEOMAGNETISM; SOLAR cycle; SUNSPOTS; SUN observations
- Publication
Geomagnetism & Aeronomy, 2013, Vol 53, Issue 7, p852
- ISSN
0016-7932
- Publication type
Article
- DOI
10.1134/S0016793213070062