Recent Events Reported by Observers

Detected by weiliu, Submitted at 2012-03-24T00:52:31

2012-03-11T07:40:00 --> 2012-03-12T06:30:00

Two filament eruptions on SW limb. The first is a loop-shaped eruption, likely originated behind the limb. Hours later, the vertical promience sheet (304 red) within a cavity (see the oval shape at 171, yellow, above it) lifts off and erupts. Some material falls back. Note at 171 (yellow) a cusp shape expanding in width (especially on the limb) in a manner of separating double flare ribbons. This event was on the news termed UFO fueling on the Sun: http://www.msnbc.msn.com/id/46725245/ns/technology_and_science-science/&ct=ga&cad=CAEQAhgAIAAoATAAOABA3qKA-wRIAVAAWABiBWVuLV VT&cd=bpmSRnK_yto&usg=AFQjCNFiFtso4dxMZO-CcgycOP7ALAAzRA.T2AWPJggu7c

Detected by weiliu, Submitted at 2012-03-24T00:16:07

2012-03-11T21:20:04 --> 2012-03-11T23:20:04

Two surges, one on the east limb and the other on the western hemisphere, occur almost simultaneously. The eastern one appears much larger in size.

Detected by weiliu, Submitted at 2012-03-23T23:34:45

2012-03-10T15:10:04 --> 2012-03-11T00:00:04

A precursor, smaller scale eruption to the west of the AR producing the M8.6 flare (~17:25 UT) started earlier at ~15:30 UT. After the M8.6 event, the transequatorial loops on the west limb started to rise upward, likely being perturbed by the major eruption.

Detected by weiliu, Submitted at 2012-03-23T22:28:42

2012-03-10T11:40:04 --> 2012-03-10T21:20:04

A dome-shaped coronal cavity on SW limb, with a dark filament at its center.

Detected by halocme, Submitted at 2012-03-22T21:28:19

2010-05-12T13:30:05 --> 2010-05-12T15:30:05

Not spectacular as expected of a B1.6 flare, but the disturbance front is at least seen along the limb.

Detected by halocme, Submitted at 2012-03-16T22:20:46

2012-02-23T07:30:00 --> 2012-02-23T09:00:00

The SolarSoft Latest Events page describes this event as "NW Limb Eruption, Partially Occulted, B6.4 LDE, EUVME/CME, SECCHI-Ahead EUVI Wave." But as I looked at EUVI science data, I found it was only marginally a wave.

Detected by halocme, Submitted at 2012-03-16T02:00:35

2012-01-19T11:00:04 --> 2012-01-19T16:00:04

A major eruption in the northeastern quadrant takes place close in time with two other eruptions in the northwestern quadrant. Are these regions somehow connected?

Detected by halocme, Submitted at 2012-03-15T22:12:46

2012-03-10T16:50:24 --> 2012-03-10T19:20:24

The global propagating front seems to have started earlier than mentioned in the previous report. But it seems that the region south of the flare was disturbed twice, possibly by a flare-related wave and then by the CME (just a speculation, which needs to be supported by more careful analysis.)

Detected by halocme, Submitted at 2012-03-15T21:59:18

2012-03-10T16:50:25 --> 2012-03-10T19:20:25

Compared with the M6.3 flare from 9-Mar-2012, this movie may give an impression that the large-scale eruption starts earlier in the flare development. Indeed, clear northwestward motions are seen around 17:22 UT. However, global waves seem to start only after 17:40 UT at a greater distance from the flare center, and southward moving fronts are more easily seen in difference images (as shown in the next movie.)

Detected by halocme, Submitted at 2012-03-15T17:19:05

2012-03-09T03:15:01 --> 2012-03-09T04:45:01

This movie shows that the initial brightening around 03:25 UT has little to do with the associated eruption, which seems to start only around 03:37 UT. Indeed the GOES light curve consists of an impulsive peak preceding the main flare. Of course it is possible that the apparently confined flaring at the earlier time somehow makes it easier for the main flare to be eruptive (e.g., via breakout).

Detected by halocme, Submitted at 2012-03-15T16:58:03

2012-03-09T03:15:36 --> 2012-03-09T04:45:36

The propagating front is obvious in intensity images at all of the three wavelengths (211A, 193A and 171A). It seems that the southward front is blocked by two active regions before reaching the coronal hole. How about the northward front? Let's discuss it privately.

Detected by halocme, Submitted at 2012-03-15T16:33:01

2012-03-08T21:15:00 --> 2012-03-08T22:15:00

The prominence eruption in 304 A images looks confined, but material is seen moving out in a narrow channel in coronal channels.

Detected by halocme, Submitted at 2012-03-15T16:24:43

2012-03-08T19:20:24 --> 2012-03-08T21:00:24

This is again likely to be from a region behind the limb. It is not clear if this is a separate from the previous event. The associated CME is more bullet-like (narrow) than loop-like. The loops in the northern part of the movie seem to be post-eruption loops, meaning that the region was part of the previous eruption. The cusp-like dark region over these loops is mostly in 171 A images, meaning high temperatures.

Detected by halocme, Submitted at 2012-03-15T16:01:39

2012-03-08T14:30:00 --> 2012-03-08T18:32:00

The prominence standing over the limb is seen to gradually rise. It is not clear if a small eruption in the disk region has to do with triggering the eruption of the prominence. The southern part is more clearly opened up, throwing material northward, hence the appearance of the associated CME in LASCO data that is extended to north.

Detected by halocme, Submitted at 2012-03-15T15:19:41

2012-03-08T09:50:24 --> 2012-03-08T12:20:24

Two filament eruptions are seen around the same time near central meridian and on the west limb.

Detected by halocme, Submitted at 2012-03-15T07:55:47

2012-03-08T03:00:00 --> 2012-03-08T04:32:00

As a prominence moves out untwisted the overlying corona appears to dim (at 171 A and 211 A).

Detected by halocme, Submitted at 2012-03-15T07:28:44

2012-03-06T00:00:04 --> 2012-03-08T00:00:04

This movie gives an impression that the cavity becomes clearer as the prominence material starts to stay at certain heights.

Detected by halocme, Submitted at 2012-03-15T07:12:05

2012-03-07T20:40:12 --> 2012-03-07T21:40:12

This is a minor jet. Jets tend to recur, but this one does not seem to . It is seen primarily at 193 A (not clear at 211 A or 171 A).

Detected by halocme, Submitted at 2012-03-15T07:04:48

2012-03-07T16:50:24 --> 2012-03-07T18:10:24

No clear eruption found, but the high corona is seen to dim. No corresponding signatures at 171 A or 304 A.

Detected by halocme, Submitted at 2012-03-15T07:00:06

2012-03-07T14:20:24 --> 2012-03-07T15:20:24

No trace of this eruption at 171 A or 304 A. No clear disk signatures, so the eruption probably emanated from a limb-occulted region.