Halo CME @halocme Twitter profile

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Halo CME

7 years

X8.2 flare from #AR12673 was impressive. Coronal wave went past both poles. Big proton event, likely GLE. EIS must've seen plasmoid ejection

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Halo CME

@halocme

3 months

The X4 flare this morning. See a spectacular global coronal wave.

Halo CME

@halocme

3 months

The latest X4 flare (on 2024-05-10) is the 40th X-class flare and the 4th strongest in solar cycle 25.

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Halo CME

@halocme

7 months

I am fortunate to end year 2023 with this spectacular X5.0 (not X4.8, sorry for the typo) event. The global coronal wave is quite impressive as captured in this video. I presume there was a big CME (coronagraph data not available yet at this moment.)

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Halo CME

@halocme

3 years

FINALLY! AR 12887 produced a global eruption (associated with an X1.0 flare). The dark part of this animation represents coronal dimmings due to a CME, which may arrive at Earth on Halloween, in addition to a filament that went off south.

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Halo CME

@halocme

8 months

Spectacular global disturbances from an energetic CME on 2023/12/14. It was associated with an X2.8 flare in AR 13514. We see >10 MeV protons are increasing, but it is not clear if the flux reaches 10 pfu (NOAA S1 level). This CME may only glance Earth at best.

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Halo CME

@halocme

9 months

Exciting time now thanks largely to AR 13500. This video shows running difference full-disk images in three AIA channels, capturing large-scale disturbances from the latest eruption/M9.8 flare. How can you say this event will have no impact on Earth?

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@halocme

2 years

I am stunned by this: Large-scale disturbances across the solar disk. How can we avoid predicting the CME will hit Earth around 31 March, given its origin in the heart of Earth strike zone? The eruption appears strong enough to overcome resistance from southern coronal holes.

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Halo CME

@halocme

1 year

I love this! Highly eruptive X2.2 flare with a nice coronal wave, although I doubt the CME will even glance Earth. The flux of energetic particles will be SolO>STA>L1. And high flux at PSP and BepiColombo, from which the region is in the western hemisphere.

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Halo CME

@halocme

1 year

The latest M3.7 flare in AR 13229 was a dynamic filament eruption, accompanied by an impressive coronal wave. The region was in Earth strike zone in longitude, but the bulk of the CME looked like heading north. So perhaps only its southern flank may arrive at Earth (on Feb 27).

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@halocme

3 months

This video features a spectacular global coronal wave, the lower part of a shock wave driven by the fast halo CME. This event was also associated with an X5.8 flare from AR 13664, the second largest flare in solar cycle 25. The proton event had a quick rise and a hard spectrum.

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Halo CME

@halocme

3 months

Close-up view of the Memorial Day X2.8 flare. This is an animation of SDO/AIA 171 Å images. Note loop oscillations right after the eruption, and a subsequent growth (apparent rising motion) of post-flare loops.

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@halocme

6 months

Spectacular global coronal wave that accompanied the CME associated with the latest X3.3 flare in AR 13575. This is a scale-up version of the previous M5.1 and M4.0 events from the same region. This flare could have been ~X10 if not occulted by the limb.

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Halo CME

@halocme

15 days

This one, on 28 July, is the biggest of the three. The spectacular global coronal wave suggests an Earth-bound CME. The associated flaring from AR 13764 consisted of two peaks, at M7.9 and M9.9.

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@halocme

2 months

Amazing eruption! It was associated with an M9.7 flare in AR 13697. It was preceded by a prominence eruption going to west and north. The eruption was accompanied by a spectacular global coronal wave, and later observed as a fast (~1500 km/s) asymmetric halo CME.

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@halocme

7 years

X2.2 and X9.3 flares from #AR12673 today. They were both gorgeous flares, but there is huge difference in terms of their possible geo-impact

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@halocme

3 years

Today's eruption/M1.6 flare from AR 12882 is not only thought to have launched an Earth-directed CME, but also was accompanied by an impressive large-scale EUV wave. It even spawned a secondary wave when it hit a region to southwest (lower right).

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Halo CME

@halocme

2 years

The filament eruption seen in SUVI 304 Å images as reported by @erikapal occurred ~35° behind the east limb (per STEREO-A). This turned out to be a huge CME! This animation combines running difference images from LASCO C2 and C3, which cover 6 Rs and 30 Rs, respectively.

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Halo CME

@halocme

3 months

This animation captures the latest X8.7 flare again in AR 13664. It is the largest in solar cycle 25. We see much dynamic motions, including a global coronal wave, than in the last video for the X1.7 flare that occurred earlier today.

Halo CME

@halocme

3 months

AR 13664 continues to be an X-class flare producer even after it rotated off the west limb. This video is for the first X-class flare on 2024-05-14. Just a minor eruption. I will upload another video for the X8.79, third today, which has just occurred.

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Halo CME

@halocme

1 year

Spectacular eruption on 2023-08-05, accompanied by an X1.6 flare in AR 13386. The flare impulsive phase was well preceded by a slow rise of a filament as seen over the limb.

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Halo CME

@halocme

2 years

The X1.3 flare that occurred in AR 12975 today once more produced spectacular large-scale disturbances. Its possible impact on the heliosphere may be better evaluated after LASCO data are lined up.

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Halo CME

@halocme

1 year

Impressive eruption! It was accompanied by an M5.7 flare) from AR 13363 near the SW limb. In this animation, the last GOES peak (the flare still ongoing) corresponded to a global eruption that affected a large area of the Sun. This followed a smaller filament eruption.

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Halo CME

@halocme

1 year

The halo CME on 2023-04-21 resulted from this eruption (also an M1.8 flare). In addition to strong dimmings, it produced a gorgeous large-scale coronal wave as seen in this AIA tri-color running ratio movie. Expect at least some impact on Earth on the 24th.

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Halo CME

@halocme

2 years

The latest M9.6 flare from AR 12975. Similar to yesterday's X1.3 flare.

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Halo CME

@halocme

1 year

X2.2 flare on 2023-02-17. This is a 15-hour-long animation of AIA 131 Å images. We note downflows above the post eruption arcade to the end of this animation.

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Halo CME

@halocme

9 months

Yesterday's big eruption, which launched a likely Earth-bound CME. It would be interesting to examine what looks like a coronal wave because in this case we may partly see the CME itself. I thought the CME would arrive 30 Nov -1 Dec, but some people predicted the 29 Nov arrival.

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Halo CME

@halocme

2 years

Spectacular coronal wave from the latest eruption associated with an X1.1 flare in AR 12994. Stronger disturbances counterclockwise along the limb than into the disk. This animation does not contain a ~30 minute interval before the eruption showing loop contraction. @xudong_sun

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@halocme

2 years

Big eruption from a spotless region! The associated flare was only C1.6. As is clear, it occurred right in Earth-strike zone. We expect to greet the CME here on April 14. Thanks @Suntoday for an earlier warning.

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Halo CME

@halocme

3 years

Wow! Spectacular eruption from AR 12859. Even though the magnitude of the associated flare is only C3.0, the location and appearance of the eruption make it hard to be silent about possible effect on Earth. Prepare for a 30 August arrival.

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Halo CME

@halocme

3 months

G5 storm!! The Kp index hit 9, which was never seen in previous solar cycle (24). The Dst index has also reached -350 nT, never seen in cycle 24. What if strong southward field and fast solar wind conditions persist? The Kp index may no longer be useful.

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Halo CME

@halocme

1 year

WHY EXCITED? The latest M8.6 flare in AR 13234 - some may be excited because it was almost X-class - showed an eruption seen over the NW limb, but not as spectacular as the M3.7 and M6.3 events a few days ago. Indeed the CME associated with the M8.6 flare is underwhelming.

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Halo CME

@halocme

2 years

Wow, a halo CME! It is bigger than what I anticipated based on coronal dimmings (see my earlier tweet). This may give us more than a glancing blow starting on March 14.

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@halocme

1 year

Impressive eruption accompanied by an X1.5 flare in AR 13386 (again!). Note QPP - fast moving wave trains counterclockwise - around the 1 o'clock angle.

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Halo CME

@halocme

6 months

We are still waiting for LASCO data, which will show the CME that caused this spectacular global disturbance and M9 flare. I am enchanted by the scientific topic of how the CME is captured by coronal dimmings and EUV waves, and will present some results at IAU Symp. and COSPAR.

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Halo CME

@halocme

5 months

Amazing eruption associated with an X1.1 flare in AR 13614. It was accompanied by a global coronal wave with QFP wave trains. The GOES >10 MeV proton flux may exceed the S1 storm level. As expected, a halo CME followed, which may hit us in the morning (UT) of March 24.

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@halocme

2 years

Whoa, G3 (Kp=7) storm! Who predicted this?

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@halocme

2 years

Scary eruption from the far side of the Sun on 2022-02-15. SDO/AIA nicely caught it. The source region may have been slightly east of E125 (my earlier estimate), but not too much. This is because we clearly see wave signatures on the visible disk.

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Halo CME

@halocme

2 years

BREAKING NEWS Two eruptive flares today. The first one (C3.5) came from AR 13113 (east or left), preceded by brightening in AR 13110. The second one (M5.8), peaking at 20:10 UT, came from AR 13110. The first one accompanied a bigger eruption. The second one looked like a surge.

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@halocme

2 years

Rapid growth of solar active region AR 13078 over the past four days.

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@halocme

2 months

A huge filament is sitting in the southern hemisphere, as if to scare us once it gets erupted. The eruption could lead to a big geomagnetic storm. How can it be destabilized? Perhaps flares in AR 13697, even those confined and boring ones, may contribute. Let's monitor them.

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@halocme

2 years

Nice eruption today from AR 13150, producing a CME and associated with an M1.6 flare. This video captures a large-scale coronal wave that reflects sudden lateral expansion of coronal structures. Not all eruptions/CMEs show such a wave. Type II/IV bursts are also reported.

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@halocme

1 year

The latest M3.8 flare in AR 13234. It was eruptive, accompanied by a coronal wave. But it was not strong enough to produce energetic protons observable to GOES (high background!).

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Halo CME

@halocme

2 years

AR 13182 has jist produced an eruptive M4.6 flare.

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@halocme

3 months

NEWS! The biggest flare in solar cycle 25 has just been updated. X8.79 at 2024-05-14 16:51 UT.

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@halocme

3 years

Spectacular eruption associated with a M5.5 flare from AR 12929 (peak at 2022-01-20 06:01 UT). The remarkable coronal wave indicates a strong shock wave driven by a CME. The GOES > 10 MeV proton flux may exceed the SWPC warning threshold (10 pfu). @Loveon999

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Halo CME

@halocme

2 years

The latest X1.5 flare from AR 13006 was eruptive, marked by a gorgeous coronal wave. But the possible effect on Earth may need professional evaluation by @TamithaSkov @erikapal and @chrisoutofspace . This may be only a glancing blow as the CME was largely directed south.

Judith de Patoul

@judithdepatoul

2 years

@TheSunToday Indeed here the large and beautiful coronal wave detected by Solar Demon Dimming Detection tool @ORB_KSB . Enjoy! 🤩 👉

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Halo CME

@halocme

7 months

This morning (on 2024-01-29) saw a substantial eruption and partial halo CME from AR 13559, associated with an M6.8 flare. This animation of AIA images reveals disturbances along the limb. Their crossing of the ecliptic plane may explain a major proton event, hitting ~70 pfu.

Carina ☀️ Alden

@SpaceWxRina

7 months

Starting to see a rise in the protons at GOES, they’re climbing fast! (from @NWSSWPC website)

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Halo CME

@halocme

3 months

Memorial Day X-class Flare! X2.8 flare from a yet to be numbered (AR 13697) region, likely the return of AR 13664. Like those intense flares from AR 13664 up to 2024-05-15, this one is very eruptive as indicated by a nice global coronal wave that is captured in this video.

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@halocme

1 year

Solar maximum is approaching as the polar magnetic field reverses polarity. The mean field started weakening in lower (60-70 deg) latitudes in the second half of 2022.

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@halocme

3 years

Today's M1.8 flare was quite eruptive with a coronal wave and dimmings, resulting in a partial halo CME. Its northwestern flank may glance Earth on 23 Dec. The flare occurred in the eastern part of AR 12908, preceded by a C2.9 flare in AR 12907.

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@halocme

10 months

A gorgeous eruption on Sun's northeastern (upper left) limb late on 26 October 2023. This was followed by a halo CME as expected, but it may not hit us because of the location too far away from Earth strike zone.

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@halocme

2 years

Second halo CME at 20:24 UT. AR 12975 is amazing to have produced two Earth-directed CMEs only ~9 hours apart.

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@halocme

3 months

AR 13668 continues to produce eruptive flares. This X2.2 flare on May 9 was associated with another halo CME, likely Earth-directed. The messy geo-space environment starting May 10 or 11 and lasting a few days will be explained by @AusSpaceAgency , @TamithaSkov and other experts.

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@halocme

4 years

Update #2 on C7.4: The associated CME is a full halo CME, although asymmetric. It may be more than a glancing blow at Earth. There is a chance of auroras at lower latitudes than at normal times.

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@halocme

3 years

The recent eruption reported by @CocoasCola and @erikapal (thanks!) was a big one with a global coronal wave as shown in this animation. There will be no effect on Earth since the source region was ~30° behind the limb (per STEREO). Observed flare class: B8.7, Actual: likely >X1

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@halocme

6 months

Why is AR 13590 CME-deficient? None of the X-class flares therein were associated with a CME driven by an erupting flux rope. Based on the impression from this AIA 171 Å /HMI Blos movie, the active-region-wide dipolar field seems to remain strong, inhibiting eruptions.

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@halocme

3 years

Solar active region AR 12936 is still increasing size and complexity. Major flares may be possible.

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@halocme

3 years

Three regions on the solar disk erupted nearly simultaneously, possibly spawning other eruptions to the east and over the west limb. Almost no flare except for post-eruption arcades in AR 12941. These eruptions themselves may not be geoeffective, but prepare for something major.

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@halocme

2 years

Nice large-scale coronal wave, associated with a M1.4 flare in AR 13176.

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@halocme

5 years

I got a big Christmas present. An EUV wave (large-scale coronal propagating front) that we have not seen since May. It occurred in a region not identified with an active region number. Remarkably, there was hardly a flare (at most B1.1 with background added).

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@halocme

1 year

Here is my usual colorful animation for today's powerful eruption and M6.3 flare in AR 13229. I make these movies only for eruptive flares associated with a major CME. Note it was preceded by another eruption from a quiet region to southeast.

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@halocme

6 months

I made my usual video anyway for the latest X6.3 flare. As I noted earlier, we note some outward motions unlike in completely confined flares. But they are diffuse, slow and not far-reaching. Unlike CME-related coronal waves, they are not strongly driven by a flux rope.

🌻 Surya

@Suryaloka

6 months

@halocme I’m sure your movie is beautiful.

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@halocme

3 months

EXCITING TIME! Several possibly Earth-directed CMEs. This video shows LASCO C2 images side by side with GOES X-ray light curves. Note the frames starting 02:48 UT on May 7, 05:36, 12:24, and 22:36 UT on May 8. The near-Earth space environment will be messy during May 10-13.

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@halocme

3 years

Here is an animation of AIA 211, 193 and 171 Å images for the M1.1 flare from AR 12936 that has just been observed.

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@halocme

2 years

The M9.6 (almost X-class) flare that occurred in AR 12993 - on the northeastern periphery of the leading spot. My impression is that a flux rope tore open rather strong overlying magnetic field. The CME may not form the classic three-part structure.

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@halocme

3 years

The M1.1 flare that occurred less than an hour ago was eruptive, producing a very nice coronal wave. Please monitor coronagraph data to see if the associated CME may impact Earth( possibly around 23 April).

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@halocme

7 months

Gorgeous filament eruption and subsequent two-ribbon formation on 2024-01-22. Coronagraph data are not available yet. I am unwilling to say if the CME has an Earth-directed component.

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@halocme

3 months

The latest X-class flare (X1.6) flare in AR 13663 was certainly not "just a flare." Its eruptive signatures were not outstanding but at least worth making this kind of movie. The CME from this eruption was largely directed north, and may not come to Earth - but we never know.

Vincent Ledvina

@Vincent_Ledvina

3 months

One of my favorite tools, Solar Demon, is showing an EUV wave associated with the CME currently lifting off the Sun due to an X1.6 flare from AR 3663. I think it's safe to say there is something coming. Here are the data on Solar Demon: @halocme

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@halocme

1 year

Nice eruption from the latest X2.0 flare. Compare this with yesterday's M3.8 flare from the same region (AR 13234).

Halo CME

@halocme

1 year

X-CLASS FLARE! AR 13234 has just produced an X2.0 flare, which looks eruptive. But the region is already so close to the NW limb that the CME may not be Earth-bound.

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@halocme

6 months

Major eruption associated with the X2.5 short-duration flare from AR 13576 on 2024 February 16. The CME may not impact Earth because it was launched close to the limb, but we will see if the shock is detected at L1.

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@halocme

1 year

X2.2 flare in progress! I will post an update only if it is very eruptive.

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@halocme

5 months

The latest M7.4 flare from AR 13599 was not just a flare. We see a nice coronal wave launched to west, and a CME, the brightest part of which was limited to NNW (in LASCO C3). Small proton event. This eruption makes us think about the relation of flares with CMEs and shock waves.

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@halocme

7 months

The halo CME reported in the previous post was due to an eruption from the southern border of AR 13557. A diffuse coronal wave is noted in this animation. There are a couple of bad frames due to recovery from the eclipse and a 5 minute gap around 09 UT.

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@halocme

2 months

Second X-class (X1.0) flare of June 2024, followed by an M7.4 flare. The X1.0 looked as boring 🥱 as the X1.1 on May 31 and X1.4 on June 1, but the M7.4 was eruptive as seen in this video. Question: was the eruption seen over the limb during 18:45-18:55 related to AR 13967?

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@halocme

5 years

Spectacular eruption from solar active region AR 12734 with a large-scale coronal propagating front and quasi-periodic wave train. But this was over 7 months ago. We may not expect a show like this in this elongated solar minimum conditions.

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@halocme

1 year

Gorgeous filament eruption in Sun's north polar region to the west. This will not impact us, but it was a remarkable event.

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@halocme

1 year

Spectacular eruption from a region behind the northwest limb. Was this from AR 13361, still at ~W105? Only 15° limb-occulted, we would expect some "flare" emission in GOES X-rays. Was the epicenter a new region further behind the limb ? Observations from L4 would've shown us.

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@halocme

1 year

X1.1 flare on 2023-06-20 from AR 13341. This AIA 3-color running difference movie captures large-scale coronal waves that inform how extended the associated CME might've been. I have not made these movies lately, because of the lack of flares that keep me awake.

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@halocme

3 months

One more eruption from AR 13668. This one highlighted a nice global coronal wave. The associated flare was X1.1.

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@halocme

1 year

While people were watching AR 13388 in the southeastern quadrant (MM target region), AR 13376, already behind the northwestern limb, would have said "Don't forget me." Latest M4.1 flare, perhaps more intense, given that it was limb-occulted. Nice jet-like ejection.

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@halocme

3 years

Gorgeous prominence eruption now, nicely captured by SUVI/GOES-16.

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@halocme

2 years

G2 (Kp=6) storm. Enjoy the show.

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@halocme

2 years

Evolution of three sunspot regions, AR 12993, 12994 and 12995 (not official yet). Not huge changes. Hopefully these guys will produce spectacular eruptions as they approach Earth-strike zone.

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@halocme

7 months

An eruption from Earth strike zone, producing an asymmetric halo CME. Prepare to feel at least some effect late on 23 January 2024.

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@halocme

1 year

G3 STORM FOR CONSECUTIVE 9 HOURS! Kp stays at 7-. I think this is due partly to the arrival of the 2nd shock (from the CME associated with an M6.3 flare on Feb 25) around 10:10 today (right). This was not easy to see in the real-time solar wind plot from SWPC (left).

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@halocme

5 years

The C1.3 flare on 2019/03/08 was very eruptive. These videos of different kinds of images show large-scale coronal propagating fronts (EUV wave), coronal dimming, coronal holes and flare. Without coronagraph data, I would predict the CME will arrive at Earth on 3/11-12.

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@halocme

5 years

Today was reasonably exciting. Surprising nice explosion (coronal wave) occurred in a non-active region with a sub-A-class flare. A secondary wave was also seen in AR 12734, not in sync with (well before) the A3.1 flare. These were good enough for solar minimum conditions.

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@halocme

3 months

A major eruption/CME earlier today (AR 13664), associated with an M8.8 flare and causing an S1 proton storm. Its spectrum was softer than the S2 storm from the 11 May CME (associated with an X5.8 flare). Only a weak coronal wave in this video may be related to a softer spectrum.

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@halocme

1 year

The M1.2 flare from this morning in AR 13413 was associated with a big CME and an S1 proton event. We also saw a spectacular coronal wave (often accompanying fast CMEs) as in this video, which had been rare since early August.

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@halocme

3 months

X3.4 eruptive flare from AR 13664 on 2024-05-15. The region was ~20° behind the limb, so it could have be X5-10 if observed without limb occultation. The eruption took place in two steps, first going northward (small X-ray increase) and then southward around the flare peak.

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@halocme

3 years

Eruptive C2.3 flare from AR 12864 with a nice global EUV wave. A bright CME is seen in LASCO C2 images so far available.

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@halocme

2 years

Polar crown filament erupted this morning and was captured by SDO/AIA. It was observed as a gorgeous coronal mass ejection in LASCO coronagraph images. It may be too south to affect Earth, but we will look for signs of a glancing blow.

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@halocme

5 years

This is amazing! AR 12740, which is an old cycle region and I honestly have not expected much, has produced a C9.9 (almost M-class) flare. The flare was very short duration, but note the spectacular large-scale coronal propagating front in the difference movie!

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@halocme

2 years

This animation shows where the M1.8 and X1.1 flares occurred with respect to the sunspots of AR 12993 (north) and AR 12994 (south). This shows AIA 94 images (flares) on HMI continuum (spots). It also shows only the X1.1 was eruptive.

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Halo CME

@halocme

2 years

Six flares above the M1 class occurred during the past 2 days, and most of them were associated with a CME. The first one, M1.1 at 29 Apr 07:30, was associated with the fastest CME (~1700 km/s), even producing a proton event. Others, including the X1.1, were slower (<800 km/s).

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@halocme

11 months

AR 13435 produced M4.0, M8.2 and M8.7 flares on September 19, 20, and 21, respectively. They were all associated with a CME and coronal wave. This video combines the three events.

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@halocme

7 days

The latest X1.7 flare in AR 13767 was associated with an energetic CME, which was responsible for a minor proton event. The protons may not reach the S1 radiation storm level, however. A coronal wave seen in this movie was quite spectacular - above the average.

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@halocme

1 year

Spectacular filament eruption from a quiescent region (no sunspots). This amounted to C3.1 in GOES class, a long duration event. The CME was directed mostly northward, probably not Earth-directed.

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@halocme

1 year

Eruption associated with the M5.4 flare was accompanied by a large-scale coronal wave. It produced only a minor proton event. The location close to the limb makes the CME non-Earth-directed. This was preceded by a small eruption in a small, decayed region northeast of AR 13256.

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@halocme

2 years

G2 (Kp=6) storm! Enjoy the show!

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@halocme

9 months

On November 27, 2023, there were two impressive eruptions in the northeastern quadrant of the Sun. The first one, closer to disk center, launched a CME that was likely Earth-directed. Expect at least some effect during 30 Nov - 1 Dec.

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