Artemis II Rocket Tore 5,000km Holes in the Ionosphere

What exactly did Artemis II do to the ionosphere?

The rocket punched three separate holes in the charged layer of the upper atmosphere, all above North America and each more than 5,000 kilometers across.

The ionosphere is the layer where solar radiation strips electrons from atoms, leaving a soup of free electrons and positive ions. That mix bends and delays radio waves, which is why GNSS satellites like GPS have to correct for it. When a rocket blasts through, it can stir that layer like a rock dropped in a pond.

Artemis II did more than stir. According to research set to be published in Geophysical Research Letters, the launch produced three distinct pulse waves. One came from the initial liftoff; the others came from upper-stage engines firing directly in the upper atmosphere. The result was a barrage of atmospheric disruption more powerful than anything seen from previous launches, SpaceX's included.

The study team, led by earth scientist Charles Lin of National Cheng Kung University in Taiwan, measured the disturbances using ionosphere data. The holes were not permanent, but they were huge, and they lingered long enough to be measured as they spread.

Could these holes really disrupt GPS?

The study didn't measure GPS errors directly, but the physics is clear: ionosphere disturbances can delay satellite signals and shift a position fix by meters.

Lin told Space.com that a positioning error of just a couple of meters is enough to make an autonomous car change lanes. "It could have a strong impact not only on self-driving cars but also on drone positioning," he said.

That doesn't mean Artemis II caused a wave of Teslas to swerve in April. The study didn't track GNSS performance during the launch, and the team says follow-up work is needed. But the finding adds to a growing concern: as launches become more frequent, so does human-made space weather.

For now, the practical risk is temporary and localized. A rocket launch can disturb the ionosphere for minutes to hours, and GPS receivers typically recover as the disturbance fades. The bigger question is what happens when launches happen every week instead of every few months.

Why this matters more than a single launch

The number of rocket launches is climbing fast, and each one leaves a mark on the upper atmosphere. Scientists want to know whether those marks add up.

Artemis II was a test flight, but it was also a preview of the launch cadence NASA and its partners want for the Moon and beyond. SpaceX alone is aiming for dozens of Starship flights per year. Each one will punch its own hole in the ionosphere.

The research doesn't argue for grounding rockets. It argues for measuring what they do. Lin's team hopes to follow up with direct GNSS measurements during future launches, which would turn a theoretical risk into a concrete number.

Until then, the takeaway is simple: the ionosphere is another environment we're changing, and we're only starting to watch it. The same launch boom that's straining data center power grids is now leaving marks in the sky.

What it means for you

If you live in North America, the disturbances were directly overhead, but the study didn't find evidence of widespread GPS outages. Drivers in the US, UK and EU are unlikely to notice anything from a single launch.

The longer-term concern is for companies testing autonomous vehicles and drone delivery. Those systems rely on precise positioning, and a few meters of error can matter. Regulators in the US and Europe are already looking at how to certify navigation systems that can't always trust GPS.

Artemis II was a triumph for human spaceflight, but it left a bigger mark on the atmosphere than any launch before it. The next step is to measure what that mark means for the GPS signals we rely on every day.