Recent Events Reported by Observers

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 2016-05-16T21:33:15

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 2016-05-16T21:33:16

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 2016-05-16T20:28:01

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.

Detected by halocme, Submitted at 2016-05-16T17:17:41

2016-05-14T15:10:10 --> 2016-05-14T16:10:10

This is the third large-scale coronal propagating front (LCPF) associated with a C-class flare in AR 12543 within a six-hour period. It is similar to the previous one, including another region to northwest that shows wave-like variations.

Detected by halocme, Submitted at 2016-05-16T17:03:57

2016-05-14T11:15:34 --> 2016-05-14T12:15:34

This large-scale coronal propagating front (LCPF) is a stronger version of the previous one around 09:30 also from AR 12543. In 171 A images, another region to the northwest also shows wave like variations.

Detected by halocme, Submitted at 2016-05-16T16:44:12

2016-05-14T09:15:34 --> 2016-05-14T10:31:34

Immediately following the large-scale coronal propagating front (LCPF, coronal wave) from AR 12543, a flaring/eruption was seen in a distant region AR 12544, east of the central meridian. Since the wave propagation was preferentially toward south to west, perhaps the occurrence of the latter event was by coincidence, rather than induced by the LCPF.

Detected by halocme, Submitted at 2016-05-16T16:34:17

2016-05-14T09:15:34 --> 2016-05-14T10:15:34

This large-scale coronal propagating front (LCPF) seems to have been launched by a small eruption that was also associated with a C2.5 flare in AR 12543. The propagation was mostly south to west.

Detected by halocme, Submitted at 2016-05-16T16:14:46

2016-05-14T06:10:10 --> 2016-05-14T07:10:10

Eruptive motions started locally associated with a compact brightening. The motions largely traced closed loop structures.