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This page demonstrates some sample significant solar events uncovered by our digitized film observations. High-resolution images were taken by BBSO 10 or 26 inch telescopes. Full-disk images were taken by BBSO 8 inch telescope. To load mpeg movies, click links and/or image icons. Please note that many movies are for a "quick-look" purpose, hence images may not be well aligned and the image orientation may not be corrected.
 

Wang & Liu (2012)
1. Circular ribbon flares
1991 Mar 17 M2   1991 Mar 18 M1 23UT   
1991 Mar 17 X1    1991 Mar 22 X9
1991 Mar 18 M5   1989 Apr 9 X3
1991 Mar 18 M1   1991 Mar 10
1991 Feb 25 M1   1991 Jul 2 (event 2)
1989 Sep 5 (event 7)
1978 Jul 10 (event 9)
2. Magnificent eruptions on 1991 Jul 2 in NOAA AR 6703, consisting of a jet-related circular ribbon flare and an M4/1N two-ribbon flares following a partial filament eruption (10E#567). The circular flare is also associated with remote brightenings, which can be more clearly seen in full-disk images.
3. A remarkable Moreton wave and sequential chromospheric brightenings, after the initiation of an X9 flare on 1990 May 24.
fixed difference
high-resolution obs (10E#542)
Another Moreton wave on 21-May-90
4. Sympathetic flares on 1989 Sep 21 (10E#531).
5. A quiet filament "broken" by an emerging flux region (10E#529).
[34 MB]
6. Triple filament eruptions (SL#135).
7. Flare ribbons showing unshearing motion (10E#530). 8. Gradual eruption of polar crown filaments in few days. Double flare ribbons slowly developed on the disk.
1989 Aug 18 (SL#139) [31 MB]
1986 Nov 26 (SL#119)
1989 Apr 10 (SL#128)
1989 May 25 (SL#130) [22 MB]

He I D3 Flares

9. A black-light flare showing a dark D3 bubble on 1978 Jul 10, as studied by
Zirin (1980)
cf. Halpha
10. A remarkable black-light M6 flare at NOAA AR 4492 on 1984 May 22.
cf. Halpha
11. A great D3 flare on 1982 Jun 25 with dark ejections (10E#371), showing four main flare ribbons/kernels and a remote brightening. 12. A big D3 flare on 1982 Dec 17, showing two main flare ribbons and two remote brightenings (10E#383).
13. A big D3 flare on 1984 Apr 25 showing two long ribbons (26W#7087). 14. An X2.7 D3 flare on 1984 May 20.

Major Flares
15. An X4.0 flare on 1989 Mar 9 (and subsequent flares) at NOAA AR 5395 (10E#512) [14 MB]. This active region was responsible for the well-known power outage in Quebec, Canada.
cf. full-disk obs.
16. A major flare on 1989 March 23 (10E#513).
17. A major limb flare on 1989 March 17 (10E#513). 18. A major flare with sigmoidal flare ribbons on 1989 Apr 9 (10E#514).
19. A major flare on 1993 Mar 6 with two long ribbons (10E#591). 20. A huge extended flare on 1989 Aug 12 (10E#527).

Other Major Flares  (Global Halpha Network digital data)    
2001 Apr 2 X20 flare 2003 November 4 X28+ flare
2003 Oct 28 X17.2 flare