FLARE DEVELOPMENT IN ACTIVE-REGION NOAA-6891, 30 OCTOBER, 1991

被引：0
|
作者：
BASURAH, HM
MALAWI, AA
ALMLEAKY, YM
KAMAL, F
机构：
来源：
SOLAR PHYSICS | 1995年 / 158卷 / 02期
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中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A great sunspot group of October 1991 (NOAA 6891 at L = 189, B = -10) was observed, in which an eruptive flare of importance (X2.5/3B) has been reported. A Ca II-line 3933 Angstrom filter was used, and during a time interval of 3 hours more than 90 frames were taken, using a CCD camera. The progress and the distribution in size of the two main flare points have been obtained; they covered an area of about 1800 millionths of the solar disk within a time interval of about 24 min. The average apparent horizontal velocity was 70 km s(-1).
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页码：383 / 386
页数：4
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