Sunspot nests as traced by a cluster analysis

Details Sunspot nests as traced by a cluster analysis Sunspot nests as traced by a cluster analysis

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990soph..129..221b&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 129, Oct. 1990, p. 221-246.

Physics

41

Cluster Analysis, Sunspots, Computerized Simulation, Solar Cycles, Spatial Distribution, Temporal Distribution

Scientific paper

Sunspot nests, defined as those small surface spaces within which a succession of spot groups appears, are the subject of the present single-linkage clustering technique search through longitude, latitude, and time for sunspot groups occurring over the August, 1959 through December, 1964 period. The appearance of spot groups in a nest is found to be intermittent; while active nest spots may be absent for nearly two complete rotations, in many nests more than one group has been recorded for one disk crossing. A strong tendency is noted for the nests to cluster once again in larger nests, so that more than a third of the compact nests are components of larger ones.

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