Halo CME

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Halo CME

Halo CME

@halocme

Solar physicist at LMSAL (alum UTkyAst). I believe space weather missions (for safe human space exploration) need a way higher investment than science missions.

Palo Alto, California Katılım Ekim 2013
977 Takip Edilen31.1K Takipçiler
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Halo CME
Halo CME@halocme·
MOST POWERFUL FLARE IN SOLAR CYCLE 25. It was X9.0 in GOES X-ray measurement. It was quite eruptive, leaving a coronal wave. The eruption/CME seemed to result from magnetic reconnection rather than ideally from a pre-existing flux rope. It may come in less than 3 days.
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Halo CME
Halo CME@halocme·
The eruption on 10 May 2026 from AR 14436 (associated with an M5.7 flare) was spectacular enough to wake me up. The region is the target of a Major Flare Watch by the Max Millennium Chief Observer.
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Halo CME
Halo CME@halocme·
Impressive eruption associated with the second X-class (X2.5) flare on 2026-04-24. Note that the coronal wave propagating into the disk was suppressed by a coronal hole.
Николай Кършаков@pDoATSoAVWvFw24

@halocme Hi! There is another X flare. Could you make running difference video? Because yours are the best!

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Halo CME
Halo CME@halocme·
Gorgeous eruption associated with an X2.4 flare in AR 14419 as it approaches the west limb. The CME is not Earth-directed, and the shock is not strong enough to produce a noticeable increase in GOES proton flux. But this is still a nice event.
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Halo CME
Halo CME@halocme·
Indeed, I seemed to be still asleep😪when I tweeted the video. AR 14119 should have been AR 14419 and AR 14220 should have been AR 14420. See the figure below.
Halo CME tweet media
SunWolf@Sunwolf77

huh? u still asleep? it's AR14419 & AR14420 😏👋🌞⚡ though the current numbering system is ridiculous, old spots get 'new' numbers as they transit Eastern limb. If we had full coverage of '360°' with multiple solar orbiters we could revise the system & perpetually keep better track of sunspots & 'far side activity' as AR's transit beyond the western solar limb. but no, they need all our money for forever wars. 😅🙏

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Halo CME
Halo CME@halocme·
I have waken up from long (~3 week-long) sleep thanks to increasing solar activity. Several eruptions occurred from AR 14119. But it is the eruption in AR 14220 in upper left that engages me because of a coronal wave and a fast and fat CME. This video captures two eruptions.
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Halo CME
Halo CME@halocme·
A shock wave arrived around 15:00 UT on 2026/04/03, resulting in a G3 (Kp=7-) storm. This seems to be from the April Fool's Day CME. But how did it arrive, even though it was seen to propagate largely in NW direction, and how did it so soon? Recent CMEs tend to arrive late.
Halo CME tweet media
Halo CME@halocme

Late on April Fool's Day, there was a filament eruption in and above AR 14403, causing an extended CME (largely moving to northwest). The associated flare peaked at C6.1, but the eruption was almost over before the start time of the flare (23:08) as shown in the NOAA event list.

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Halo CME
Halo CME@halocme·
Late on April Fool's Day, there was a filament eruption in and above AR 14403, causing an extended CME (largely moving to northwest). The associated flare peaked at C6.1, but the eruption was almost over before the start time of the flare (23:08) as shown in the NOAA event list.
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Halo CME
Halo CME@halocme·
Good old days?! Note that the Sun may not be the only thing to blame for less intense geomagnetic storms. Our planet also may have changed in a way to react with the solar wind less dramatically.
Vincent Ledvina@Vincent_Ledvina

Imagine the month of aurora they had during September 1957... just going through some historical Dst data right now, and I always get humbled by the older solar cycles. If you think this current cycle 25 is active, in reality it is average to below average.

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Halo CME
Halo CME@halocme·
A gorgeous eruption associated with an X1.5 flare in AR 14405, exhibiting impressive large-scale disturbances. A glancing blow may be expected on April 1-2.
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Halo CME
Halo CME@halocme·
There was an M3.9 flare in AR 14403 this morning, with some large-scale disturbances mostly along the limb. A minor CME was also seen, apparently not Earth-directed. The region consists of a single spot, not looking promising, but who knows how it evolves into Earth strike zone?
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Halo CME
Halo CME@halocme·
Congratulations on catching nice auroras. But I wonder if the solar storms were well understood. I thought the small increase ("1") signaled a delayed arrival of the 3/16 CME and that "2" was due to the 3/18 CME. But then what about "3"? Was the HSS from CH more important?
Halo CME tweet media
Halo CME@halocme

What happened to the recent promising CMEs? We saw a shock at ~20 UT on 03/20 (shaded in pink).  If this resulted from the 03/18 CME,  the 03/16CME left only the tiny increase at ~01:30 on 03/20 (blue line). I'd have expected it to arrive much earlier and to be more prominent...

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Halo CME
Halo CME@halocme·
@doktornihil I want to understand how a CME is "eaten by" the high speed stream, using realistic numerical models (which will continue to be the only way for us to understand the underlying processes).
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Halo CME
Halo CME@halocme·
What happened to the recent promising CMEs? We saw a shock at ~20 UT on 03/20 (shaded in pink).  If this resulted from the 03/18 CME,  the 03/16CME left only the tiny increase at ~01:30 on 03/20 (blue line). I'd have expected it to arrive much earlier and to be more prominent...
Halo CME tweet media
Dr. Tamitha Skov@TamithaSkov

Fashionably Late! After being delayed in transit by the "legs" of a glancing solar storm blow, we are finally seeing hints that the expected solar storm may be arriving now! Originally forecasted to arrive on the 19th, STEREO-A HI imagery indicated it was moving slower than coronagraph imagery predicted. Aurora chasers get ready, the storm will likely intensify!

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Vincent Ledvina
Vincent Ledvina@Vincent_Ledvina·
@halocme Well, we are at G3 now so it worked out in the end I think 🤣
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Halo CME
Halo CME@halocme·
Another eruption in AR 14392 associated with an M2.7 flare. The region is right in Earth strike zone, and we may expect the CME to arrive on March 21. This event was also characterized by a nice coronal wave, likely a shock wave that was responsible for a type II radio burst.
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Halo CME
Halo CME@halocme·
Thank you. But the gap between 09:48 and 15:00 makes it hard to find the possible CME from the eruption that took place around 12:00. Let's wait a little longer. GOES19 CCOR also does not seem to have many frames.
JMM716@MShil716

@halocme Just now, some frames are up!

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Keşfet

@pDoATSoAVWvFw24 @doktornihil @Vincent_Ledvina @elonmusk @BarackObama @taylorswift13 @cristiano @BillGates