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The models indicated a severe storm, capable of bringing auroras to unusual regions. But the solar structure traveled slower than estimated and lost strength along the way. The result was between moderate and strong, with limited effects, although scientists warn that more material may still arrive.
The Sun once again directed its fury towards the planet, but the scare was less than feared. A cannibal-type coronal mass ejection, formed by the fusion of two clouds of solar plasma, hit the Earth in the early hours of June 5, 2026, but with a weaker impact than predicted, causing a geomagnetic storm of moderate to strong level instead of the severe one that had been considered.
According to specialized space weather platforms, such as Spaceweather.com, the solar material reached the Earth’s magnetic field in the early hours of Friday, around 2 AM Brasília time, with intensity below the initial estimate. The models pointed to the possibility of a severe geomagnetic storm, classified as level G4, but the event seems to have remained between levels G2 and G3, considered moderate and strong. It is worth noting that, until the production of this article, a final consolidated report of the phenomenon had not yet been released.
What are solar plasma clouds
To understand the phenomenon, it is necessary to know what the Sun expels.
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The so-called solar plasma clouds are coronal mass ejections, known by the acronym CME, gigantic eruptions of superheated plasma and magnetic fields that the Sun launches into space and that can travel millions of kilometers towards Earth, carrying particles and radiation away from the star.
According to NASA, these explosions occur when the magnetic lines tangled in sunspots break, firing jets of plasma.
Solar eruptions are classified by a letter system, A, B, C, M, and X, where each level is ten times more intense than the previous one, with class X being the strongest.
In the current episode, the explosions originated from a specific solar region, named AR4455, which was especially active in the previous days.
Why this CME is called cannibal
The curious name has a technical explanation.
When a faster coronal mass ejection reaches and engulfs another that was launched earlier, scientists use the term cannibal CME to describe the fusion of the two structures, which then travel together as a single and denser cloud of particles, combining the energy of both.
This type of phenomenon is usually especially efficient in generating geomagnetic storms, precisely because the junction of the ejections concentrates more energy and tends to produce a more intense interaction with Earth’s magnetic field.
In the current case, sunspot AR4455 launched several of these clouds, and one of them, faster, reached the previous one during the journey, forming the cannibal structure that headed towards the planet.
Why the impact was less than expected
The difference between the forecast and what actually occurred has to do with speed.
The delay in the arrival of the plasma cloud suggests that it moved through space at a slower speed than estimated, which contributed to reducing its intensity upon reaching Earth’s magnetic field, causing the storm to fall short of the worst-case scenario predicted.
Even so, experts caution that the episode was not necessarily over.
According to the scientific outreach organization EarthSky, cannibal CMEs are complex and constantly evolving structures, so the first impact does not represent, by itself, the end of the event, and new portions of material may reach Earth in the following hours, prolonging the observed effects and maintaining the possibility of auroras.
What are the effects of a storm of this level
Despite the frightening name, the impacts are usually controlled.
Geomagnetic storms of level G3, on a scale from G1 to G5, can cause auroras at higher latitudes than usual and cause mild interferences in communication and navigation systems, but the effects on technology in general tend to be minimal, without major risks to the population.
The main attraction of these events is usually visual: the auroras, which in stronger storms can be seen in regions that do not normally observe them, such as areas in the northern United States and Europe.
Scientists continue to monitor the solar region AR4455 which, having a magnetic field inverted in relation to the standard, a configuration known as anti-Hale, remains unstable and may favor new explosions at any moment.
The Sun in its period of greatest activity
The episode fits into a specific moment of the star.
The Sun goes through an activity cycle of about 11 years and is currently in the so-called Solar Cycle 25, a period in which the increase in the number of sunspots, which are concentrations of energy on its surface, makes eruptions and ejections of plasma clouds more frequent towards space.
As the Sun rotates around its own axis approximately every 27 days, the sunspots successively disappear from view and return to point towards Earth.
Therefore, episodes like this week’s tend to repeat throughout the period of higher solar activity, which reinforces the importance of continuous monitoring done by agencies like NASA and NOAA, responsible for issuing alerts when one of these clouds heads towards the planet.
The arrival of another solar plasma cloud ejection to Earth, this time in a cannibal format, reinforces how space weather has become a subject of constant monitoring, even when, as now, the impact is below what was predicted.
The episode on June 5, 2026, showed that predicting the exact strength of these storms is still a challenge, as the speed and magnetic orientation of the cloud change everything.
For now, the result was a moderate to strong storm, without major disruptions, but with the reminder that the Sun, at its peak of activity, remains capable of surprising.
And you, have you ever had the opportunity to see an aurora or follow the news about solar storms? What do you think of these phenomena that connect the Sun and the Earth? Leave your comment, share your opinion, and help spread the article to those interested in astronomy, space weather, and science.
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