Mathematics – Logic
Scientific paper
Oct 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996jkas...29..217w&link_type=abstract
Journal of the Korean Astronomical Society, vol. 29, no. 2, p. 217-221
Mathematics
Logic
Sunspot Morphology, Sunspot Group, Flare
Scientific paper
We have examined morphological change and movements of individual sunspots within a sunspot group in association with a large solar flare activity (3B/X1.5) appeared on 13 May 1981. For this purpose we measured distance among spots during the period before and after the flare activity and estimated the average velocity of their movement. Our main results are as follows: (1) The longitudinal displacement among sunspots are generally greater than the latitudinal displacement. (2) During the period the spots moved with an average velocity of 1.2 km/s in longitude and 0.86 km/s in latitude. (3) The most notable change took place in the central part placed between the two ribbons of the flare.
Ma Guanyi
Wang Jia Long
Yun Hong Sik
Zhang Guiqing
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