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Data from three solar observatories, Learmonth, Holloman, and San Vito, are used to study the variations in the average number of sunspots per sunspot group. It is found that the different types of sunspot groups and the number of sunspots in these g
Externí odkaz:
http://arxiv.org/abs/1710.01775
On the basis of morphological analysis of yearly values of the maximum CME (coronal mass ejection) speed index, the sunspot number and total sunspot area, sunspot magnetic field, and solar flare index, the solar wind speed and interplanetary magnetic
Externí odkaz:
http://arxiv.org/abs/1604.05941
Sunspots are dark spots on the solar surface associated with strong magnetic fields. The number, area, and brightness of sunspots are supposed to reflect the intensity of the solar magnetic fields and are often used as proxies for their long-term var
Externí odkaz:
http://arxiv.org/abs/1307.8005
Geomagnetic activity in each phase of the solar cycle consists of 3 parts: (1) a floor below which the geomagnetic activity cannot fall even in the absence of sunspots, related to moderate graduate commencement storms; (2) sunspot-related activity du
Externí odkaz:
http://arxiv.org/abs/1307.7960
Autor:
Gadimova, S., Haubold, H. J., Danov, D., Georgieva, K., Maeda, G., Yumoto, K., Davila, J. M., Gopalswami, N.
Publikováno v:
Sun and Geosphere 6 (2011) 7-16
The UNBSSI is a long-term effort for the development of astronomy and space science through regional and international cooperation in this field on a worldwide basis. A series of workshops on BSS was held from 1991 to 2004 (India 1991, Costa Rica and
Externí odkaz:
http://arxiv.org/abs/1108.2247
Autor:
Georgieva, K., Kirov, B.
Geomagnetic activity has two main peaks in the 11-year sunspot cycle caused by two types of solar agents: coronal mass ejections and high speed solar wind streams, whose variations in number and intensity are related to the variations in solar toroid
Externí odkaz:
http://arxiv.org/abs/physics/0703187
The most geoeffective solar drivers are magnetic clouds - a subclass of coronal mass ejections (CME's) distinguished by the smooth rotation of the magnetic field inside the structure. The portion of CME's that are magnetic clouds is maximum at sunspo
Externí odkaz:
http://arxiv.org/abs/astro-ph/0511257
Autor:
Georgieva, K., Kirov, B.
The North-South asymmetry of solar activity has been recognized for different solar phenomena. Following Waldmeier, it is now assumed that solar activity dominates in the Northern solar hemisphere during the ascending part of the secular solar cycle,
Externí odkaz:
http://arxiv.org/abs/physics/0509198
Publikováno v:
In Journal of Atmospheric and Solar-Terrestrial Physics September 2018 176:42-50