National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
How did the last cycle of solar activity end and the new one begin
Bumba, Václav ; Garcia, A. ; Klvaňa, Miroslav
We demonstrate that also during the period of activity minimum on solar surface two active longitudes exist, and that active regions of both cycles closely correlate with them. We study the development of the magnetic fields in this transition phase and, above all, the influence of convection on their distribution.
The influence of the reference zero-velocity on the model of the vector velocity field in a symmetric sunspot
Klvaňa, Miroslav ; Bumba, Václav ; Krivcovová, N.
It appears that the occurrence of the vector velocity in an umbra caused by the shift of the Doppler-velocity zero-reference level can be successfully corrected by the position change of the point of symmetry of the spot. In such a case, the character of the spot vector velocity field will= be conserved.

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