Sol (Sun) and its phenomena

[Gaby]

It's relatively calm, despite the multiple flares and the impressive sunspots. Wonder if the "bird" had anything to do with it. The Cs clue back in 2025 is that it was an expulsion of mass from sun's core due to temporary opening of channel. Maybe the core needs to "recover"?

So the recent sun's big event turned out to be a non-hystericized event. Here's the final summary via xras

The surge in solar activity has been completed

One of the strongest solar activity bursts in the 21st century, observed since the beginning of February, ended so suddenly, as if someone had pulled a switch. The active area 4366 raging opposite the Earth, which had only one event left before repeating the record of the current century in the number of strong outbreaks (Лаборатория солнечной астрономии (XRAS) ) and two events before it was beaten, it just stopped producing flashes. The day before, on Wednesday and Thursday, February 4 and 5, Moscow time, 11 explosions of the M and X levels were registered here. Yesterday, on Friday, this number dropped sharply to zero, and today, with the start of the weekend, the solar activity graph has completely degenerated into an almost straight line.

One of the main mysteries that science now has to decipher is the almost complete "sterility" of the active center. Several very large flares that occurred during these days during the period when the active center was in the zone of maximum influence on the Earth, each of which could create a high-level magnetic storm, led only to weak episodic disturbances of the Earth's magnetic field. Not a single "black swan" (Лаборатория солнечной астрономии (XRAS) ), which these days have been waiting for, has not fluttered out of the Sun. The impact of the flares was apparently neutralized by some features of the configuration of the active region, as a result of which none of the flares was able to form and throw into space a large plasma cloud — an almost integral attribute of major events, the arrival of which to the Earth and brings the magnetic field out of balance.

At the moment, it seems that the Sun should enter another period of stabilization, the duration of which, however, is difficult to predict. Since the beginning of 2026, there have already been two exceptionally large bursts of activity, during one of which, in January, the strongest radiation storm near Earth in the 21st century occurred (Лаборатория солнечной астрономии (XRAS) ), and during the second, in February, the record for the number of large outbreaks was almost broken. Yesterday, very strong explosions occurred on the far side of the Sun (Лаборатория солнечной астрономии (XRAS) ), which indicates that the star retains large reserves of energy. Nevertheless, some period of peace is still guaranteed — let's look at its duration.

It can be noted that the active region 4366 will be in the field of view of the Earth for at least 5 more days, therefore it retains the theoretical chances of breaking the record of the current century. To do this, she will have to gather the remnants of her strength over these days and produce 2 flashes of at least M1.0 level.

 

[Gaby]

The fans are celebrating, as the sun picked up some activity and it was finally cataloged as coming from the same region that was active a few days ago. This means, there's a new 21st century record.

Active region 4366 has updated the record of the 21st century for the number of strong solar flares.

The NOAA catalog has just been updated. Active center 4366, which is currently being observed from Earth, was credited with three category M flashes at once. This means that he now has 66 events to his credit.

The previous catalog record was 3664, followed by 64 strong outbreaks of level M and above. Among other things, the largest magnetic storm in 20 years has been recorded behind it.

Before the record was updated, there was a dramatic pause for almost 3 days, during which the group of spots practically stopped producing flashes altogether. Frankly speaking, it seemed that everything was already done.

 

[Olivierlejardinier]

I think it belongs here even though it's also related to the South Atlantic Magnetic Anomaly. A recent paper (Feb 04 2026):

Earth’s Magnetic Anomaly Reveals Space Weather Influence on Human Behavior

Abstract​

Does space weather influence human behavior? Examining homicide rates from 1990-2021 across developed nations reveals a striking pattern: geomagnetic disturbances driven by solar wind correlate positively with violent crime in the United States, Canada, United Kingdom, Australia, New Zealand, and South Africa (r = 0.65-0.87, p < 0.001). However, in Brazil and Uruguay—countries at similar latitudes butpositioned beneath the South Atlantic Magnetic Anomaly where Earth’s magnetic field weakens to 60% of normal strength—this relationship inverts (r = -0.75 and -0.49). This geographic specificity, occurring precisely where geophysics predicts altered electromagnetic environments, provides compelling evidence for genuine solar-terrestrial effects on human behavior and offers a natural experimental framework for investigating how Earth’s protective magnetic shield mediates spaceweather impacts on biological systems.

Plain language summary

The Sun releases charged particles that interact with Earth's magnetic field, creating geomagnetic disturbances or "space weather." Whether these disturbances affect human behavior has remained controversial, and Earth's magnetic shield isn't uniform everywhere.

Paper Overview

We examined thirty-two years of homicide data from eight nations to investigate whether space weather correlates with violent crime, comparing countries at similar latitudes but different magnetic field strengths.

Findings Summary

Geomagnetic disturbances showed strong positive correlations with homicide rates in six countries. However, in Brazil and Uruguay, located beneath the South Atlantic Magnetic Anomaly where Earth's magnetic field weakens to sixty percent of normal strength, this
relationship reversed.

Key Takeaways

This geographic reversal occurring precisely where Earth's protective magnetic field weakens suggests space weather may genuinely influence human behavior, with our planet's magneticshield playing a crucial mediating role.

One question would be whether the sun alone is responsible for the phenomenon or if someone/something modulates it to their advantage?

 

[Gaby]

One question would be whether the sun alone is responsible for the phenomenon or if someone/something modulates it to their advantage?

Very interesting. It's like the auroras, more intense in the Northern hemisphere but weaker or non existent south of the South Atlantic Anomaly. I think it was said as well that UFOs avoid the SAA. Here it is:

April 13th 2024

Q: (L) Does it have anything to do with UFOs and underground bases?

A: No. They avoid the area.

There's also this:

July 26th, 2014

(dugdeep) We wanted to know about the border of the frequency fence. It's always referred to in terms of the US, but is there ever... Like, what about Canada and Mexico? Does it affect us, too?

A: Absolutely! It has no spatial boundaries, except that proximity to targeted areas are more intensely "hit".

Q: (fabric) Does the weakening magnetic field over North America have an effect on the frequency fence?

A: More like result of.

 

[Gaby]

Well, I don't know. They don't count external sources of energy for the sun though.

xras

By the way, something is clearly going on with the new champion. Firstly, the area, having passed through the minimum, seems to have started growing again, which is quite rare. And, of course, the attempt of the head spot to change color from blue to red is impressive, which, strictly speaking, never happens. The headspots, and even of this size, in the northern hemisphere of the Sun throughout the entire 25th cycle can only be blue (have a positive polarity). This is the foundation of the basics. Actually, it hasn't changed its color, and obviously it won't (don't rewrite textbooks), but the attempt itself looks blasphemous.

It is unclear what this means, or if it means anything at all, but the flow of X-ray radiation from the region has already increased by about three times in a day.

Video in its original quality (22 MB) — link (https://xras.ru/info/images/20260208.mp4 ).

 

[Gaby]

The fans are celebrating, as the sun picked up some activity and it was finally cataloged as coming from the same region that was active a few days ago. This means, there's a new 21st century record.

Despite the fanfare, it would not have a significant impact.

xras

The geomagnetic situation is currently calm, despite increased flare activity. Weak disturbances associated with variations in solar wind speed are possible during the day. The forecast for the next 2–3 days is close to neutral. The probability of magnetic storms is low.

Flare activity — a partial resumption of activity is observed in sunspot group 4366, which, thanks to this, broke the record for the number of strong flares in the current century yesterday. There is still nothing close to the peaks of the first days of February, when 10-20 M and X-class flares occurred per day. These are isolated events. The region has now moved out of its geo-effective position (opposite the Earth) and is already significantly shifted towards the edge of the Sun, from where an impact is only possible after very strong explosions with large mass ejections. Since the active center has not been able to produce a single such ejection even in its best “years,” the probability of such a scenario is considered to be close to zero. Large flares, even if they occur, will almost certainly be purely aesthetic spectacles.

 

[Ca.]

The recent solar activity has become problematic for NASA's launch of SpaceX to the Moon, as Musk has put the Mission to Mars on hold, though NASA claims the delay of the launch is due to weather.

Solar Cycle Rhythm's (Released Tuesday, September 15, 2020)

13714: Solar Cycle 25 Is Here. NASA, NOAA Scientist 13708: Potential Giant World Circles a Tiny Star

How To Track The Solar Cycle​

Will 2026 bring strong auroras? What the sun's recent activity tells us

2025 was another busy year on the sun. But how did it compare with 2024, and what will 2026 bring for solar activity and the northern lights?

www.space.com

By Ryan French, published December 18, 2025

Florida weather

SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids

THE DANGER OF SUNSPOTS THAT TURN AWAY FROM EARTH: Big sunspot AR4366 is about to disappear over the sun's western limb. This makes it uniquely dangerous. Scroll past this farewell shot from astronomer David Wilson to find out why:

"On Feb. 9th, I managed to catch AR4366 just before it went over the western limb," says Wilson, who filmed the departing sunspot from his backyard solar observatory in Inverness, Scotland.

Sunspots located near the sun's western limb are magnetically connected to Earth. The sun's magnetic field spirals around like a lawn sprinkler--a shape known as the "Parker spiral."

​

Look at this diagram. Lines of magnetic force coming out of the western limb curve around and touch our planet.

AR4366 is approaching the "danger zone." If there is an eruption in the next few days, debris may be funneled back to Earth by the Parker spiral, peppering satellites with high-energy protons. In extreme cases, these particles could reach into the atmosphere and expose air travelers as well.

Hurry through the danger zone, AR4366!

more images: from Michael Teoh of Heng Ee Observatory, Penang, Malaysia; from Howard Eskildsen of Ocala, Florida; from Richard Sears of Ballico, California


An Earth-Directed Mini-Storm & More Flares Possible | Space Weather Midweek 10 February 2026

Earthquake activity under Lake Tahoe, California. New Zealand activity. Tuesday update.

M 6.2 - Fiji region
2026-02-10 20:44:52 (UTC)21.040°S 178.335°W510.9 km depth

Annular 'ring of fire' solar eclipse February 2026: Live updates

The next solar eclipse will be on Feb. 17, 2026. Here's what you need to know.

www.space.com

 

[Gaby]

"On Feb. 9th, I managed to catch AR4366 just before it went over the western limb," says Wilson, who filmed the departing sunspot from his backyard solar observatory in Inverness, Scotland.

I'm getting the impression that all those people are just hystericized by energies that makes them go "more drama!". I mean, surely, it's getting crazy. But overall, no need to add to it. Maybe a non-zero possibility, but practically a waste of people's time to get worked up about it.

I think it's more important to note that space rocket launches are postponed because of local weather (other than fuel tech problems), which is related to the sun's activity of the last few months.

My cents.

Another counterargument here:

xras.ru

A group of spots 4341 completely collapsed on the Sun, the processes in which in mid-January caused the largest radiation storm in the current century (Лаборатория солнечной астрономии (XRAS) ) in the vicinity of the Earth, as well as a G4.66 level magnetic storm (Магнитные бури — 21 января 2026 года ), observed on January 19-21. The active center did not survive the two-week period during which it was located on the far side of the star due to the rotation of the Sun. Now, only the remnants of the sun's disk come out from behind the horizon to the Earth on the left edge of the sun's disk, in which not a single spot can be distinguished anymore.

The theoretical possibility of new major events (flares and magnetic storms) associated with the repeated passage of this active region opposite the Earth is now excluded.

Almost certainly, the same fate awaits the "superstar" of the first week of February, the group of spots 4366, which is currently sinking below the horizon on the right edge of the Sun. This area, which produced six high-level X outbreaks from February 1 to February 3, is likely to be visible for only 1-2 more days, after which it will go to the other side, where it will disappear forever. The probability of seeing it again in two weeks on the opposite side of the Sun is estimated to be close to zero.

 

[Gaby]

The "unexplained" giant prominences are the noteworthy news here:

xras

The geomagnetic situation is close to completely calm. At night, from about 1 to 4 o'clock Moscow time, short-term weak disturbances were observed. Currently, the Earth's magnetic field has returned to a calm state. There are still no external disturbing factors.

Flash activity continues to decrease. Only the 4366 group of spots supports a certain level above the average, which continues to accumulate M-flashes. At the moment, it has already registered 69 outbreaks of classes M and X, which is 5 events more than the previous leader, the 3664 region (she has 64). The superstar of February is observed today on the last day and will disappear over the horizon tomorrow. Immediately after that, the Solar flare activity is expected to drop to its lowest level. If the region produces a large flash today, especially with an outburst, it will be a very beautiful sight. Events at the edge of the Sun, observed exactly in the image plane, always look exceptionally spectacular.

Among the notable changes: giant prominences began to appear en masse on the Sun again (visible in the images as dark fibers on a disk several hundred thousand kilometers long). Last year there was a period when they formed in large numbers and sometimes flew 2-3 at a time. Then this season ended, but now there are quite a lot of them again. There are no obvious reasons for this. There were none, however, last time. Let's see what happens next.

Globally, the star's activity is now on a clear decline.

 

[Gaby]

I'm getting the impression that all those people are just hystericized by energies that makes them go "more drama!". I mean, surely, it's getting crazy. But overall, no need to add to it. Maybe a non-zero possibility, but practically a waste of people's time to get worked up about it.

And this holds, it's really calm in the sun.

xras.ru

The geomagnetic situation remains unchanged. Minimal disturbances are observed, associated with a slightly increased solar wind speed. A new coronal hole has more or less formed on the Sun, but it will only begin to affect Earth in 3-4 days. Overall, February looks very geomagnetically calm so far, especially after the turbulent January.

Flare activity remains at the same level. Over the past day, there have been a noticeable number of C and M flares, almost all of which were associated with the same region 4366. This group of spots completely disappeared behind the horizon tonight, and the flare activity graph should now drop significantly by the end of the day. The final number of M + X flares in the region is 71 and will not change. The gap between it and second place (region 3664) was 7 events. At the same time, 3664 had significantly more X flares (12 vs. 6).

The overall picture is very simple — everything is falling. The star will be extremely boring, at least until the end of the week.

 

[iamthatis]

Comet MAPS will have a very close approach to the sun, and may impact (or not), slated for April 4th.

 

[Gaby]

Comet MAPS will have a very close approach to the sun, and may impact (or not), slated for April 4th.

Yeah, a member of the Kreutz family. More info here:

Post in thread 'Comet and Asteroids'

Feb 5, 2026

And now, a member of the Kreutz family was discovered last month, about to make perihelion with the sun on early Spring. Thousands have been discovered, but this was worthy of an article about it. Some interesting details below:

Will a bright comet adorn our early spring sky? Why astronomers are getting excited about Comet C/2026 A1 (MAPS)

Some astronomers have noted that its faint magnitude "does not bode well for the comet's survival past perihelion."

www.space.com

A new comet approaching the sun has caught the attention of astronomers, primarily because of its lineage. It appears to belong to a group of comets that in some cases have briefly become outstandingly...

• Gaby

• 

Comets belonging to the Kreutz group include the Great Comets of 1668, 1843, 1882 and Ikeya-Seki in 1965. All were very bright objects, sporting long tails. They all had relatively large nuclei, probably measuring several miles or more in diameter.

But just when will another large and spectacular member of the Kreutz group, like Ikeya-Seki, appear? No one can say for sure. The last Kreutz Sungrazer to become bright was Comet Lovejoy in December 2011, and yet, that comet disintegrated shortly after perihelion.

A new comet was just discovered. Will it be visible in broad daylight?

A newly discovered comet has astronomers excited, with the potential to be a spectacular sight in early April. C/2026 A1 (MAPS) was spotted by a team of four amateur astronomers with a remotely operated telescope in the Atacama desert on January...

www.sott.net

It's moving on an orbit typical of Kreutz sungrazing comets, and already holds one record. At the time of its discovery, comet MAPS was farther from the Sun than any previous newly discovered sungrazer.

That suggests it might be a larger-than-usual fragment - perhaps.

The previous holder of this record was comet Ikeya-Seki in 1965, which proved to be the brightest of the 20th century. However, technology has moved on significantly in the past 70 years, and it seems very unlikely the nucleus of comet MAPS is as large as that of Ikeya-Seki. In turn, that makes it unlikely comet MAPS will be as bright.

They're leaving it open, though someone might have an estimation of the comet nucleus. Thus, the news release to announce a possibly shining one.

 

[Gaby]

So this is the reason there are so many geomagnetic storms within the last year or so, despite solar maximum on 2024 by international consensus. It's coronal holes, which started early last year. These ones contributed to geomagnetic storms, so much that 2025 was more active than the solar maximum placed in 2024.

More activity, relatively milder, due to coronal holes. Activity started a day earlier than expected might fit the patterns of weaker geomagnetic field, not that the sun is more powerful.

A magnetic storm is taking place on Earth

The second magnetic storm of February began on the planet at night, which is still in the range from weak to medium. The peak of the event at the moment occurred at about 5 a.m. Moscow time and amounted to G1.3 on a scale from 1 to 5 (top chart). The event has understandable reasons — there is a fairly large coronal hole in the Sun opposite the Earth — but it started about a day earlier than expected.

Earlier this month, a magnetic storm (also of a weak level) was registered on February 5. The break, therefore, was 10 days. So far, February 2026 looks calmer than the previous month. However, last January, which, as previously reported, set a decade record for the number of days with magnetic storms, the main activity was observed in the second half of the month.

The total duration of the disturbance period that began at night can be up to 2 days, but with a highly uneven impact: individual bursts and short storms during this period can be interspersed with rather prolonged "green" areas. It is considered unlikely that the storm will reach a level above G2 (average) during this period.

At night, a noticeable increase in the brightness of the auroras was observed against the background of geomagnetic disturbances. The aurora intensity index (lower graph) peaked at 8.6 on a 10-point scale, which is considered a fairly high value. Good conditions for observation occurred in the interval from 1 to 5 a.m. Moscow time. Most of the sightings were reported from the northwestern regions of the country. There was no reliable information about sightings in the central regions (Moscow and surrounding regions).

Opportunities for observing auroras over the country's territory will remain for about 3 more months, until mid-May. Further, due to the shortened duration of night time and the high altitude of the Sun above the horizon, observations will become almost impossible even for record-breaking events.

 

[Ca.]

Todays Solar Activity on the web

SpaceWeather.com -- News and information about meteor showers, solar flares, auroras, and near-Earth asteroids

TWILIGHT LUNAR OCCULTATION ALERT: When the sun sets on Wednesday, Feb. 18th, go outside and look west. Mercury and the crescent Moon will be extremely close together, low in the twilight sky. Across at least 10 southern US states, the Moon will eclipse or "occult" the planet, producing a photo-op of rare beauty. Resources: sky map | city-by-city timetables | Mercury photos

THE SUNSPOT REPORT FROM MARS: Almost every day, NASA's Perseverance rover on Mars looks up the sun. It's a great way to check the air for dust. Today's image caught something more--a large sunspot:

​

Regular readers may recognize it. It's sunspot 4366, which unleashed six X-class solar flares in early February. We can no longer see the sunspot from Earth, because it has moved to the farside of the sun, but Perseverance has a good view from Mars.

To photograph the sun, Perseverance uses its mast camera (MASTCAM), which puts about 90 pixels across the solar disk. It takes a large sunspot to show up in these low-resolution images. Sunspot 4366 is very large, indeed.

The photo confirms that sunspot 4366 is still intact. It could pose a renewed threat for geoeffective flares when it again turns toward Earth later this month.

https://twitter.com/x/status/2024016241082421329

We're Not Ready for What's About to Go Down...

Feb 17, 2026 #spaceweather #NASA #solaractivity
Earth Evolution Energy Analytics:https://www.earthevolution.com/energy...
As one of the biggest planetary conjunctions of our lives is just days away, a cosmic convergence has begun such that it may prove to be the final push of energy needed to tip humanity towards a new path of love, peace, and higher consciousness. Stefan Burns reports...

Long-term correlation found between Earth’s magnetic field strength and atmospheric oxygen

Long-term correlation found between Earth’s magnetic field strength and atmospheric oxygen

An analysis of paleomagnetic and geochemical proxy records shows that Earth’s geomagnetic field strength and atmospheric oxygen levels followed closely correlated trends over the past 540 million…

watchers.news

By Teo Blašković Sunday, February 15, 2026

An analysis of paleomagnetic and geochemical proxy records shows that Earth’s geomagnetic field strength and atmospheric oxygen levels followed closely correlated trends over the past 540 million years. The findings show that both variables increased through the Phanerozoic and peaked together during the late Paleozoic.

An analysis of geological proxy records shows that Earth’s atmospheric oxygen levels and geomagnetic field strength evolved in parallel over the past 540 million years. The study compares reconstructions of atmospheric oxygen concentration with the virtual geomagnetic axial dipole moment, a standard proxy for the intensity of Earth’s magnetic field at the surface, and identifies a strong correlation at long timescales.

Both datasets display near-linear increasing trends throughout the Phanerozoic, along with a pronounced surge between approximately 330 and 220 million years ago. Correlation coefficients reach 0.72 for the full records when no time lag is applied, indicating synchronous long-term behavior.

After removal of linear trends, the correlation remains strong, with coefficients exceeding 0.64 and time offsets of less than 1 million years, which fall within the temporal resolution limits of the proxy data.

Filtering the records to isolate shorter-period variability shows that the relationship weakens substantially at timescales below about 20 million years. Spectral analysis suggests that atmospheric oxygen proxies contain far less high-frequency power than geomagnetic field reconstructions, consistent with oxygen being governed by slower, integrative Earth-system processes.

As a result, the correlation strengthens steadily as longer band-pass filter windows are applied, reaching its highest values at periods approaching 100 million years and longer.

To assess whether the observed correlation could arise by chance from autocorrelated time series, the authors generated large ensembles of synthetic oxygen records that preserve the statistical structure of the proxy data. Monte Carlo testing places the observed correlation in the 99.9th percentile of expected values, even after detrending and the introduction of additional noise, indicating that the relationship is statistically robust.

NASA scientists summarizing the research noted that measured oxygen escape rates are far too low for geomagnetic shielding alone to account for long-term atmospheric oxygen changes, reinforcing the conclusion that both records reflect deeper planetary processes rather than direct atmospheric control.

The study evaluates and largely dismisses the hypothesis that a stronger geomagnetic field directly regulates atmospheric oxygen by suppressing the escape of oxygen to space. Estimates of modern and long-term oxygen ion escape rates are several orders of magnitude smaller than oxygen source and sink fluxes associated with magmatic degassing, organic carbon burial, and weathering.

The magnitude of geomagnetic field variability observed during the Phanerozoic is insufficient to alter escape rates enough to measurably affect atmospheric oxygen levels.

Instead, the authors identify deep Earth processes as a more plausible common influence on both variables. The long-term strengthening of the geomagnetic field may reflect the onset and progression of solid inner core growth, which enhances compositional buoyancy and drives more vigorous convection in Earth’s liquid core. This mechanism would naturally produce an increase in geomagnetic field intensity over hundreds of millions of years.

The late Paleozoic peak shared by both atmospheric oxygen and geomagnetic field strength coincides with the assembly and persistence of the supercontinent Pangea and with the Kiaman Reversed Polarity Superchron. Supercontinent formation alters heat-flow patterns across the core–mantle boundary and can impose long-lived thermal heterogeneity on the geodynamo, thereby influencing both magnetic field intensity and polarity.

At the surface, the same tectonic configuration affects weathering rates, volcanic degassing, and the global redox balance, all of which influence atmospheric oxygen over comparable geological timescales. Coupled interior and surface processes operate slowly enough that their effects would not necessarily produce an observable lag between geomagnetic and oxygen records.

The authors note that current long-term Earth system models typically treat the geomagnetic field as static or external and do not incorporate its evolution or coupling to mantle dynamics. The observed correlation shows a gap in integrated modeling of Earth’s interior and surface environments and points to the need for coupled simulations capable of resolving interactions across the core, mantle, crust, and atmosphere over geological time.

References:

1 Strong link between Earth’s oxygen level and geomagnetic dipole revealed since the last 540 million years – Weija Kuang et al. – Science Advances – June 13, 2025 – DOI: 10.1126/sciadv.adu882 – OPEN ACCESS

https://twitter.com/x/status/2023984374094373224

https://twitter.com/x/status/2023410115639181346

 

[Gaby]

As one of the biggest planetary conjunctions of our lives is just days away, a cosmic convergence has begun such that it may prove to be the final push of energy needed to tip humanity towards a new path of love, peace, and higher consciousness. Stefan Burns reports...

What a load of BS! Really!

An analysis of paleomagnetic and geochemical proxy records shows that Earth’s geomagnetic field strength and atmospheric oxygen levels followed closely correlated trends over the past 540 million years. The findings show that both variables increased through the Phanerozoic and peaked together during the late Paleozoic.

This study is not directly related to the sun. It's related to changes on inner Earth and how that influences the geomagnetic field. I think this research could go in "Watch the skies and land and oceans".

They found that a higher virtual geomagnetic axial dipole moment (dipole strength at Earth’s surface) tends to coincide with higher reconstructed atmospheric O2 levels. But their timeline is so long, that they're not even sure what that means.

Nowadays, the overall geomagnetic field is not getting stronger, though. It's weaker over North America, stronger over Russia. Big clue right there.

However, it's not black and white because there are studies arguing for the contrary: weaker magnetic field, more oxygen reaching Earth. It depends on what they're analyzing. For instance, see:

Near-collapse of the geomagnetic field may have contributed to atmospheric oxygenation

Earth’s magnetic field was in a highly unusual state when macroscopic animals of the Ediacara Fauna diversified and thrived. Any connection between these events is tantalizing but unclear. Here, we present single crystal paleointensity data from 2054 and 591 Ma pyroxenites and gabbros that define a dramatic intensity decline, from a strong Proterozoic field like that of today, to an Ediacaran value 30 times weaker. The latter is the weakest time-averaged value known to date and together with other robust paleointensity estimates indicate that Ediacaran ultra-low field strengths lasted for at least 26 million years. This interval of ultra-weak magnetic fields overlaps temporally with atmospheric and oceanic oxygenation inferred from numerous geochemical proxies. This concurrence raises the question of whether enhanced H ion loss in a reduced magnetic field contributed to the oxygenation, ultimately allowing diversification of macroscopic and mobile animals of the Ediacara Fauna.