A sky that shouldn’t look the way it does has a subtle unnerving quality. On the evening of June 4th, people pulled over on the side of the road outside of Columbus, their phones raised and their necks craned, gazing at green and violet ribbons that hung above the tree line as if they had no right to be there. This was not Iceland. It was Ohio.
Two days prior, on June 2nd, a sunspot caused the event that resulted in those lights. Not any sunspot, mind you. After days of tightening magnetic field lines, Sunspot 4455, a dark, restless area on the sun’s surface, finally gave out. The fields broke. A number of X-class solar flares, the strongest type of solar eruption, and several rapidly moving clouds of magnetized plasma, called coronal mass ejections, were launched into space.
What transpired next was what set this specific event apart, even by the increasingly bizarre standards of recent solar activity. One of those CMEs swallowed the slower one it had launched ahead of it when it caught up to it. When two eruptions combine to form a single, denser, faster-moving mass, scientists refer to this as a cannibal CME. It was predicted by NOAA’s models to be a strong but controllable G3 storm. The real impact was more forceful than that. The auroras visible well south of the predicted zone told their own story, though the precise amount of difficulty is still up for debate.
With its designation, Sunspot 4455 is among a select few. Because its magnetic polarity runs in the opposite direction of all other sunspots in its solar hemisphere, scientists refer to it as an anti-Hale sunspot. Less than 10% of sunspots receive this designation. The magnetic configuration is intrinsically unstable due to the reversed polarity; it is more likely to continue erupting and to snap violently. Solar observers believe that 4455 is not yet complete.
As this develops, it’s difficult to ignore how much the public’s perception of the sun’s behavior has changed in recent years. Auroras were visible in latitudes that had never seen them before thanks to the Mother’s Day storm in 2024. The majority of Americans were unable to identify a geomagnetic storm scale prior to that. Before a weekend trip, people in Pennsylvania and Rhode Island are now checking spaceweather.com in the same manner as they check radar apps. The sun has changed, and our attention to it has also changed.
In 2024, the sun’s roughly 11-year cycle of sunspot production reached its solar maximum. However, scientists have cautioned that what follows could be more bizarre than the peak itself. The sun is currently in a phase known colloquially as the “battle zone,” which is marked by instability throughout the star’s recently reversed magnetic field. There are more anti-Hale sunspots. More solar holes are opening. The arrival of geomagnetic storms is less predictable. One of the reasons it’s worth closely observing is that it’s a poorly understood period.
The upper limit of what is feasible in this situation is still truly concerning. The most potent solar storm in history, the Carrington Event of 1859, released energy equal to about 10 billion one-megaton atomic bombs. Telegraph wires caught fire as a result. It created auroras that were bright enough to read by at midnight in the Caribbean. Furthermore, the sun may have caused even more powerful events in the distant past, long before there was any infrastructure to be harmed, according to ancient tree rings. Nobody can say with certainty whether anything of that magnitude could occur again. It is feasible. It’s worth sitting with just that.
For the time being, the majority of Ohio drivers who pulled over saw something they had never seen before. The sun is still restless, the CME struck harder than expected, and the sky took on unexpected colors.A sky that shouldn’t look the way it does has a subtle unnerving quality. On the evening of June 4th, people pulled over on the side of the road outside of Columbus, their phones raised and their necks craned, gazing at green and violet ribbons that hung above the tree line as if they had no right to be there. This was not Iceland. It was Ohio.
Two days prior, on June 2nd, a sunspot caused the event that resulted in those lights. Not any sunspot, mind you. After days of tightening magnetic field lines, Sunspot 4455, a dark, restless area on the sun’s surface, finally gave out. The fields broke. A number of X-class solar flares, the strongest type of solar eruption, and several rapidly moving clouds of magnetized plasma, called coronal mass ejections, were launched into space.
What transpired next was what set this specific event apart, even by the increasingly bizarre standards of recent solar activity. One of those CMEs swallowed the slower one it had launched ahead of it when it caught up to it. When two eruptions combine to form a single, denser, faster-moving mass, scientists refer to this as a cannibal CME. It was predicted by NOAA’s models to be a strong but controllable G3 storm. The real impact was more forceful than that. The auroras visible well south of the predicted zone told their own story, though the precise amount of difficulty is still up for debate.
With its designation, Sunspot 4455 is among a select few. Because its magnetic polarity runs in the opposite direction of all other sunspots in its solar hemisphere, scientists refer to it as an anti-Hale sunspot. Less than 10% of sunspots receive this designation. The magnetic configuration is intrinsically unstable due to the reversed polarity; it is more likely to continue erupting and to snap violently. Solar observers believe that 4455 is not yet complete.
As this develops, it’s difficult to ignore how much the public’s perception of the sun’s behavior has changed in recent years. Auroras were visible in latitudes that had never seen them before thanks to the Mother’s Day storm in 2024. The majority of Americans were unable to identify a geomagnetic storm scale prior to that. Before a weekend trip, people in Pennsylvania and Rhode Island are now checking spaceweather.com in the same manner as they check radar apps. The sun has changed, and our attention to it has also changed.
In 2024, the sun’s roughly 11-year cycle of sunspot production reached its solar maximum. However, scientists have cautioned that what follows could be more bizarre than the peak itself. The sun is currently in a phase known colloquially as the “battle zone,” which is marked by instability throughout the star’s recently reversed magnetic field. There are more anti-Hale sunspots. More solar holes are opening. The arrival of geomagnetic storms is less predictable. One of the reasons it’s worth closely observing is that it’s a poorly understood period.
The upper limit of what is feasible in this situation is still truly concerning. The most potent solar storm in history, the Carrington Event of 1859, released energy equal to about 10 billion one-megaton atomic bombs. Telegraph wires caught fire as a result. It created auroras that were bright enough to read by at midnight in the Caribbean. Furthermore, the sun may have caused even more powerful events in the distant past, long before there was any infrastructure to be harmed, according to ancient tree rings. Nobody can say with certainty whether anything of that magnitude could occur again. It is feasible. It’s worth sitting with just that.
For the time being, the majority of Ohio drivers who pulled over saw something they had never seen before. The sun is still restless, the CME struck harder than expected, and the sky took on unexpected colors.
