Recent Events Reported by Observers

Detected by slater, Submitted at 2012-09-23T02:53:27

2012-09-20T00:00:03 --> 2012-09-20T02:00:03

A twistor unwinds at the north pole in 304A. Retrograde lateral motion means it is associated with a prominence/cavity system on the far side. Intriguingly, there is no counterpart to the twistor in 171A, which normally shows them distinctly. This could be partly to the haze of intervening material, or because the twistor is rooted on the backside so that perhaps the 171 feature is eclipsed? One can also see an arcade and cavity end on in 171A with 304A activity within the cavity. This may be the eastern portion of the same cavity wrapping around the sun.

Detected by slater, Submitted at 2012-09-21T23:28:55

2012-09-20T00:00:03 --> 2012-09-20T02:00:03

A twistor unwinds at the north pole in 304A. Retrograde lateral motion means it is associated with a prominence/cavity system on the far side. Intriguingly, there is no counterpart to the twistor in 171A, which normally shows them distinctly. This could be partly to the haze of intervening material, or because the twistor is rooted on the backside so that perhaps the 171 feature is eclipsed? One can also see an arcade and cavity end on in 171A with 304A activity within the cavity. This may be the eastern portion of the same cavity wrapping around the sun.

Detected by cheung, Submitted at 2012-09-21T23:07:44

2012-09-15T05:00:03 --> 2012-09-15T06:00:03

SDO goes into eclipse in the middle of this event so the full event is not captured. However, one canbe fairly confident that the filament did erupt since it is no longer there after the eclipse. The time scale for evaporation of the filamentary material may take several hours.

Detected by cheung, Submitted at 2012-09-21T23:03:49

2012-09-20T07:40:03 --> 2012-09-20T11:20:03

The early phase of this eruption occured while SDO was in eclipse so it is not clear whether another event triggered the eruption. The eruption consists of some filamentary material lifting off as well as what seems like magnetic field lines arranged in the shape of a light bulb.

Detected by cheung, Submitted at 2012-09-21T22:55:52

2012-09-16T21:00:03 --> 2012-09-17T05:20:03

First of all, there is a filament eruption in the foreground. This eruption appears to trigger another eruption. The latter does not have an associated filament but appears as strutures in 171 (yellow) with a light bulb morphology.

Detected by cheung, Submitted at 2012-09-21T22:55:51

2012-09-16T21:00:03 --> 2012-09-17T05:20:03

First of all, there is a filament eruption in the foreground. This eruption appears to trigger another eruption. The latter does not have an associated filament but appears as strutures in 171 (yellow) with a light bulb morphology.

Detected by cheung, Submitted at 2012-09-21T22:49:57

2012-09-16T09:40:03 --> 2012-09-16T10:40:03

In 304 (orange), much of the material lifted in this surge can be seen to drain back down. In 171 (green), one finds a faint puff that ascends (on top of the 304 material) the magnetic chimney but never falls.

Detected by cheung, Submitted at 2012-09-21T22:01:08

2012-09-15T23:20:03 --> 2012-09-16T06:00:03

The dense material in this filament seems to be heated out of the 304 passband (orange) and into the 171 passband (yellow) as it slowly rises up over a 6 hour interval. The presence of elongated, predominantly horizontal magnetic loops may have prevented the material from draining down (which typically happens with coronal rain). The interaction of the magetic field threading the filament material and the ambient field may be the source of energy for the in-situ evaporation.

Detected by slater, Submitted at 2012-09-17T00:22:11

2012-09-12T02:00:03 --> 2012-09-12T08:00:03

Repeated surging from a well-defined site in an active region on the west limb. Several interesting things: - the root of the surge shows repeated cusp formations associated with the surges. - these surges were observed by Honide SOT in Ca line, which shows the relation of the surges to the cusps in better detail - the surges do not fan out continuously, but trace out a series on constant cross section trajectories that could conceivably be previously existing but invisible flux tubes.

Detected by slater, Submitted at 2012-09-15T23:35:41

2012-09-13T00:00:03 --> 2012-09-15T00:00:03

Line of twistors emerging from the coronal fog

Detected by slater, Submitted at 2012-09-14T23:29:32

2012-09-12T00:00:03 --> 2012-09-14T20:00:03

Developing AR spits surges.

Detected by slater, Submitted at 2012-09-14T23:29:33

2012-09-12T00:00:03 --> 2012-09-14T20:00:03

Developing AR spits surges.

Detected by slater, Submitted at 2012-09-14T23:29:32

2012-09-12T00:00:03 --> 2012-09-14T20:00:03

Developing AR spits surges.

Detected by derosa, Submitted at 2012-09-14T21:05:59

2012-09-08T16:00:03 --> 2012-09-08T21:00:03

Mini-flare, coupled with a compact surge and a brightening of the associated filament, but none of the plasma appeared to be ejectied.

Detected by anny, Submitted at 2012-09-12T02:54:29

2012-09-10T07:28:03 --> 2012-09-10T14:46:03

A very spectacular coronal rain, large enough to be possibly called "coronal implosion"

Detected by anny, Submitted at 2012-09-12T02:33:18

2012-09-09T00:00:03 --> 2012-09-09T06:22:03

A structure suggestive of a coronal null

Detected by anny, Submitted at 2012-09-12T02:31:06

2012-09-09T15:30:03 --> 2012-09-09T19:06:03

Rather spectacular flows along a small flux rope.

Detected by anny, Submitted at 2012-09-12T02:28:08

2012-09-09T14:28:03 --> 2012-09-09T18:04:03

A flare caused the appearance of this coronal dimming. Shortly after this event, there was a small filament eruption in the same AR.

Detected by anny, Submitted at 2012-09-12T02:24:12

2012-09-09T17:26:03 --> 2012-09-09T19:56:03

Eruption of a small flux rope causes distant footpoint-like brightening, which is suggestive of that it broke throuth an arcade connecting to the region of the brightening. But there is another filament between the eruption and the footpoint brightening, and the reconnection in the overlying arcade does not seem to cause any disturbance to this second filament.

Detected by halocme, Submitted at 2012-09-08T18:33:46

2012-09-01T22:00:03 --> 2012-09-02T07:00:03

It turned out that a partial halo CME was observed by LASCO, starting 03:48 UT, around the peak of a long-duration event in X-rays (only about C3). The only possible source region seems to be AR 11560, in which minor eruptions were observed repeatedly as reported here. It is still not clear how a major CME arises from such small changes in the low corona (see movie) - eruptions with this magnitude are frequent and not necessarily lined with any CMEs.