Recent Events Reported by Observers

Detected by Mark Cheung, Submitted at 2016-06-27T19:26:06

2016-05-17T05:32:58 --> 2016-05-17T06:07:14

Transition region loops (SJI 1330 and 1400) that are seemingly pinched at the sites of converging photospheric flows (as seen in SJI 2832 sequences) suggest resistive flux emergence is taking place. The magnetic reconnection / cancellation taking place at and above the convergence sites create longer loops that straddle multiple flow cells. The convergence sites are also locations of enhanced emission in the SJI 1330, 1400 and 2796 channels (i.e. UV burst or bombs).

Detected by halocme, Submitted at 2016-05-20T04:45:17

2016-05-18T00:00:03 --> 2016-05-19T00:00:03

On 18 May 2016, the GOES X-ray (1-8 A) background decreased from the B3 to B2 level. This may have been caused by AR 12542 and 12545 rotating deeper behind the west limb. There is little indication that any of the disk regions decayed. This can be confirmed by making light curves of the individual regions.

Detected by Tiago Pereira, Submitted at 2016-05-18T12:31:07

2016-05-16T16:51:03 --> 2016-05-16T17:27:16

Some kind of small eruption in flaring part of AR12544. Some of the material falls back down.

Detected by Tiago Pereira, Submitted at 2016-05-18T12:16:48

2016-05-15T17:34:07 --> 2016-05-15T21:33:18

Bright Y-shaped "reconnection" jets on AR12542, seen near limb.

Detected by Tiago Pereira, Submitted at 2016-05-18T12:08:34

2016-05-14T23:26:11 --> 2016-05-14T23:50:31

Large Y-shaped "reconnection" jet on AR12544. Several small flares also occurring just outside the IRIS field.

Detected by Tiago Pereira, Submitted at 2016-05-18T12:03:12

2016-05-13T18:41:11 --> 2016-05-13T22:12:20

Two sunspots where light bridges are forming at approx the same time.

Detected by Tiago Pereira, Submitted at 2016-05-18T11:59:12

2016-05-13T22:33:52 --> 2016-05-13T22:51:15

Flaring regions on east side, large flare ribbons on west side (covered by slit).

Detected by Tiago Pereira, Submitted at 2016-05-18T11:15:46

2016-05-12T17:33:26 --> 2016-05-12T21:31:44

Unstable prominence, some coronal rain. Oscillations in prominence, possible bubble?

Detected by Tiago Pereira, Submitted at 2016-05-18T11:08:31

2016-05-12T12:10:13 --> 2016-05-12T12:52:52

Small flare on AR12544.

Detected by Tiago Pereira, Submitted at 2016-05-18T10:30:02

2016-05-11T07:33:07 --> 2016-05-11T08:31:39

Strong Y-shaped jet coming off sunspot penumbra.

Detected by Tiago Pereira, Submitted at 2016-05-18T10:12:11

2016-05-10T07:19:44 --> 2016-05-10T09:30:31

Coronal rain falling as seen from the limb. Some of the blobs cross the slit.

Detected by halocme, Submitted at 2016-05-16T23:07:05

2016-05-16T00:45:34 --> 2016-05-16T01:45:34

AR 12544 had produced a few minor eruptions before the one that accompanied a large-scale coronal propagating front (LCPF). This LCPF propagated primarily to south. Depending on the CME development (there was nothing in LASCO data partly because the source region was not far form disk center), the eruption may have consequences in the heliosphere (cf. https://twitter.com/halocme/status/732067182876753920).

Detected by halocme, Submitted at 2016-05-16T22:54:54

2016-05-15T15:00:03 --> 2016-05-16T00:00:03

The SADs associated with the major eruption/C3.2 LDE lasted many hours.

Detected by halocme, Submitted at 2016-05-16T22:05:35

2016-05-15T18:20:22 --> 2016-05-15T20:20:22

The western part of AR 12544 underwent a minor eruption. It accompanied ribbon-like brightening, surge-like outflows and temporary dimming.

Detected by halocme, Submitted at 2016-05-16T22:05:34

2016-05-15T18:20:22 --> 2016-05-15T20:20:22

The western part of AR 12544 underwent a minor eruption. It accompanied ribbon-like brightening, surge-like outflows and temporary dimming.

Detected by halocme, Submitted at 2016-05-16T21:50:03

2016-05-15T16:10:11 --> 2016-05-15T18:00:35

As is often the case, these downflows were seen after the soft X-ray peak of the associated flare. Following the initial fast downflows, the motions above the northern part of the arcade looked turbulent.

Detected by halocme, Submitted at 2016-05-16T21:33:16

2016-05-15T14:30:34 --> 2016-05-15T17:00:34

A long-duration event, which peaked at C3.2, comes from post-eruption flare-ribbons and arcades that formed to the east of AR 12542. There was clearly an eruption, but the filament was not clearly seen, suggesting that processes occurred at high altitudes.

Detected by halocme, Submitted at 2016-05-16T21:33:15

2016-05-15T14:30:34 --> 2016-05-15T17:00:34

A long-duration event, which peaked at C3.2, comes from post-eruption flare-ribbons and arcades that formed to the east of AR 12542. There was clearly an eruption, but the filament was not clearly seen, suggesting that processes occurred at high altitudes.

Detected by halocme, Submitted at 2016-05-16T20:28:01

2016-05-15T03:30:35 --> 2016-05-15T05:00:35

There seems to have been occasional synchronicity of transient activity in AR 12543 and 12544. This is an example.

Detected by halocme, Submitted at 2016-05-16T18:08:30

2016-05-14T17:35:22 --> 2016-05-14T19:01:22

In response to a minor eruption or loop expansion from the western part of AR 12544, the large-scale structures that lie almost east-west to the north of the active region are seen to shrink. This leads to apparent enlargement the coronal hole extending from the north pole.