NOTE: NOAA AR 10786 continues with C-class X-ray activity along the day. Also a couple of M X-ray flares: In particular: - a C4.2 (N08W58), peak at 02:10 UT, - a C2.4 (N13W65), peak at 05:25 UT, - a C1.5 (N08W61), peak at 06:31 UT, - a C3.0 (N13W63), peak at 07:00 UT, - a C8.3 (N09W61), peak at 08:03 UT, - a C2.3 (N11W63), peak at 10:03 UT, - a C3.1 (N11W63), peak at 11:27 UT, - a C1.5 (N10W63), peak at 12:13 UT, - a M1.0 (N12W68), peak at 13:06 UT, - a C2.3 (N13W68), peak at 15:37 UT, - a M1.5 (N08W65), peak at 16:24 UT, - a C4.2 (N10W74), peak at 21:40 UT, - a M1.3 (N09W72), peak at 22:52 UT, and - a C4.0 (N10W77), peak at 23:38 UT. 04:54 UT WN West Elongated and diffuse ragged loop-like front in the gusty outflow. 05:30 UT W Limb Bright and ragged loop front at roughly the PA of the southern leg of previous event. Much gusty outflow continues. 13:31 UT WN West Initially bright ragged front that quickly fades. The slow development of a system of loops follows. 16:54 UT WN West Bright loop front that superposes in the LOS with the pre-existent slow development of a system of loops. It is immediately followed by another bright front on W. It becomes difficult to separate both fronts in the C2 FOV. By 19:31 UT, extremely faint extensions can be seen above the N Pole (shock), apparently surrounding the C2 occulting disk shortly afterward. The event is first seen in C3 at 17:42 UT, just appearing above the W Limb. During its evolution in C3, the two apparently different fronts can be discerned: i) one developing slightly toward WNW a little bit ahead (Front #1), and ii) another one apparently wider developing toward W (Front #2). They both can be seen preceded by a very faint front ahead. It is not until 22:18 UT that extremely faint extensions can be seen above the N Pole. They are afterward barely discernible. The mean plane-of-sky of the LE of Front #1 at PA 292 was ~ 525 km/sec, and of Front #2 at PA 294 was 420 km/sec (based on C3 data). GOES reported multiple C-class (increasing) X-ray activity all along the day, as well as several M-class X-ray flares on NOAA AR 10786. In particular: - an M1.0 (N12W69) between 12:47 - 13:25 UT, peaking at 13:06 UT, - a long duration M1.5 (N09W67) between 15:47-18:07 UT, peaking at 16:24 UT, and - an M1.3 (N09W72) between 22:35 - 23:02 UT, peaking at 22:52 UT. Note that the long duration M1.5 X-ray flare was preceded by an impulsive C2.3 X-ray flare on the same AR (N12W71) between 15:33 - 15:40 UT, with peak emission at 15:37 UT. EIT 195 running difference images show a small brightening in the northern portion of AR 10786 at 15:36 UT followed by a strong brightening at 16:00 UT just a little bit to S. An intensity disturbance (wave) centered on the AR is seen developing afterward. It can clearly be seen traveling across the disk toward E. A dimming to N and S of the AR can also be seen. Note that it is the shock what could make the LASCO event associated to the long duration X-ray flare on AR 10786 to be geoeffective. 19:54 UT W Limb Ragged loop front in the trail of previous event. 23:30 UT W Limb Bright and ragged loop front. GOES reported an M1.3 X-ray falre on NOAA aR 10786 (N09W72) between 22:35 - 23:02 UT with peak emission at 22:52 UT. Gusty outflow continues.
NOTE: High Activity on NOAA AR 10786 continues. 02:54 UT WN West Bright loop front with inner structure preceded by a bright and narrow feature. Some very faint extensions to N and S. Gusty outflow continues. GOES reported an M1.1 X-ray flare on NOAA AR 10786 (N11W82) between 02:35 - 03:47 UT with peak emission at 03:16 UT. It was preceded by a C4.2 X-ray flare (N11W77) that peaked at 01:38 UT. 10:30 UT SS East Diffuse jet-like front. Time of the last C2 image analyzed: 11:54 UT.