Highest Rated Events (only 193 and 304 shown) All AR FE FL

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Detected by halocme, Submitted at 2012-09-28T20:32:17

2012-09-22T20:30:35 --> 2012-09-22T21:59:23

This eruption seems to be better viewed in the form of running difference movies. This follows or is closely related with the" eruptions supoerposed?" as reported earlier. The driver seems to reside in souther regions, but the body of the eruption is in the northern hemisphere.

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Detected by halocme, Submitted at 2012-09-28T20:07:46

2012-09-22T16:30:35 --> 2012-09-22T21:02:35

This movie is rotated counterclockwise by 90 degrees so that west is up and north is to left. It seems that the filament eruption in the southern region (to right), which is more horizontal than vertical, helps the prominence to the north erupt or become unsable.

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Detected by halocme, Submitted at 2012-09-28T18:55:09

2012-09-22T13:30:35 --> 2012-09-22T15:00:35

The associated brightening, although minor, is quite clear. It is not only the two ribbon close to the surface, but is seen at some altitudes for shorter time.

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Detected by halocme, Submitted at 2012-09-28T18:32:13

2012-09-22T12:15:35 --> 2012-09-22T13:15:35

A very minor eruption seen most clearly at 171 A seems to have some impact on higher altitudes.

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Detected by halocme, Submitted at 2012-09-28T17:23:02

2012-09-22T19:00:04 --> 2012-09-22T23:00:04

Selected this time range on the basis of a DH radio spectrum from Wind WAVES. Two type III bursts are seen around 20 UT and 21 UT. STEREO-B data show two regions around S15 E98 and S15 E125 participate in activity. It appears that the post-flare loops (responsible for the GOES B9.2 flare starting at 19:30) seen in 94 A images come from the region closer to the limb, although the type III burst lacks high frequency component, often considered to come from a region deeply occulted. Another region was also involved in two eruptions corresponding to the radio bursts.

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Detected by halocme, Submitted at 2012-09-27T04:45:17

2012-09-23T13:50:23 --> 2012-09-23T16:59:59

The region that produced a big flare and eruption on 20-Sep-2012 is now at S15 E110, only 20 degrees behind the limb. This event may be not as dramatic as the one on September 20, but EUVI data show more large-scale structures away from the active region participate in the eruption. Accordingly the flare time profile is more gradual.

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Detected by halocme, Submitted at 2012-09-26T23:02:43

2012-09-22T02:40:11 --> 2012-09-22T03:19:47

This may not be as specacular as the one on September 20, but it is observed as a partial halo CME. The source region is S15 E135.

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Detected by halocme, Submitted at 2012-09-25T18:50:31

2012-09-20T14:50:23 --> 2012-09-20T15:31:11

STEREO-B EUVI data show an intense flare at S15 E153 (from Earth). The occultation height at this longitude is almost 0.8Rs. The flare magnitude could be X10 on the basis of EUVI data. The EUV wave signature is quite modest. COR1A data indicate that the CME was initially as fast as 3500 km/s (according to my back-of-envelop calculation).

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Detected by halocme, Submitted at 2012-09-25T15:59:15

2012-09-21T11:50:23 --> 2012-09-21T13:00:23

A filament can deform as it erupts. Only after these motions, does the wetern part seem to erupt. In a more global picture, the eruption that directly drives a CME may have already taken place before 1200 UT, and the part of the filament that attracts our eyes may be just internal structures.

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Detected by halocme, Submitted at 2012-09-25T15:05:36

2012-09-21T01:20:23 --> 2012-09-21T02:20:23

This may be a kind of coronal jet although as dimming. It is not as readily visible at 171 A or 211 A.

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

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.

Rating: 3.0 (0=lowest, 5=highest)         Num Ratings:1

Detected by slater, Submitted at 2012-09-21T23:28:51

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.

Rating: 3.0 (0=lowest, 5=highest)         Num Ratings:1

Detected by cheung, Submitted at 2012-09-21T23:07:40

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.

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Detected by slater, Submitted at 2012-09-17T00:22:07

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.

Rating: 3.0 (0=lowest, 5=highest)         Num Ratings:1

Detected by derosa, Submitted at 2012-09-14T21:05:55

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.

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Detected by halocme, Submitted at 2012-09-08T18:33:41

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.

Rating: 3.0 (0=lowest, 5=highest)         Num Ratings:1

Detected by halocme, Submitted at 2012-09-07T17:54:40

2012-09-02T00:45:35 --> 2012-09-02T01:45:35

The eruption starts around 00:58 UT, when a small prominence moves to south first and then upward. The overlying structure contains both the frontal loop and the cavity as in the textbook.

Rating: 3.0 (0=lowest, 5=highest)         Num Ratings:1

Detected by halocme, Submitted at 2012-09-07T16:24:37

2012-09-02T17:40:12 --> 2012-09-02T19:00:12

As the last one of the day in the series, the eruption is restricted to the northern part of the active region and there are hardly large-scale manifestations. Note that some dark material comes back to the surface.

Rating: 3.0 (0=lowest, 5=highest)         Num Ratings:1

Detected by halocme, Submitted at 2012-09-07T16:05:00

2012-09-02T13:20:23 --> 2012-09-02T16:20:23

The event starts off as other examples in Series of minor eruptions (Eruption ), but this one has a consequence of getting a larger filament on the western side erupt. The filament eruption does not seem to have impact on large-scale loops hanging out on the limb as observed at 211 A.

Rating: 3.0 (0=lowest, 5=highest)         Num Ratings:1

Detected by halocme, Submitted at 2012-09-07T15:37:06

2012-09-02T09:10:12 --> 2012-09-02T11:00:12

Four or five areas brighten in this movie. Which ones have causal relations broadly speaking?