The observation of AR 8668 at Huairou Solar Observation as following ----------------------------------------------------------------------- date climate time observation event ----------------------------------------------------------------------- 13 no 14 no 15 cloudy 01:40-09:08 L5,T5,Ha 16 cloudy 03:29-07:20 L5 17 no 18 no 19 clear 23:06-07:18 L5,T5,V5,V4,L4,Ha eruptive filament(06:00) 20 clear 22:49-09:49 L5,T5,V5,V4,L4,Ha subflare(07:56), subflare(08:32-08:40) 21 clear 22:27-09:50 L5,T5,V5,V4,L4,Ha subflare(22:53) 22 cloudy 00:29-07:14 L5,T5,V5,V4,L4,Ha subflare(03:40) 23 cloudy 02:02-02:30 L5 subflare(05:02) 24 cloudy 03:09-06:58 L5,T5,Ha 25 cloudy 02:18-04:01 L5,Ha subflare(03:43) 26 cloudy 00:56-04:59 L5,T5,V5,V4,Ha 27 cloudy 01:44-01:45 L5 large loop prominence (00:50) ----------------------------------------------------------------------- Note: L-data of longitudinal fields T-data of transverse fields V-data of Doppler velocity fields 5-observation at FeI(5324) 4-observation at Hb(4861) Ha-monochromatic image at Ha(6563) Best wishes, Dun Jinping dun@bao.ac.cn