Physics
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ppmto..10..105j&link_type=abstract
Publ. Purple Mt. Obs., Vol. 10, No. 2, p. 105 - 108
Physics
Scientific paper
The class 2B flare observed on Nov 15, 1989 had following characteristics: (1) no preceeding dark filament in the active region; (2) the delta-type sunspots group was covered during the flare occurrence; (3) successive brightening of the second ribbon; (4) all types of radio bursts causing class III ionosphere disturbance. But neither energetic particle flux nor X-ray bursts were recorded corresponding to this event.
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