CORONAL MASS EJECTIONCME

Coronal mass ejection toward Earth, October 7, 2026

Arrival forecast
Map: Coronal mass ejection toward Earth, October 7, 2026

A coronal mass ejection, a billion-ton cloud of magnetized gas, left the Sun on October 7, 2026 at 13:53 UTC, moving at about 310 km/s (0.7 million mph). NASA’s model forecast it to deliver a glancing blow to Earth around Sunday, October 11 at 06:00 UTC. In the model’s strongest scenario it pushes the K index to 4, below storm level. A geomagnetic storm followed.

Left the SunOct 7 13:53 UTC
Speed310 km/s
Arrival (model)Oct 11 06:00 UTC
Glancing blowYes
Kp forecastup to 4
Travel time88 hours
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What happens when it arrives

If the cloud’s magnetic field points south when it hits, it can couple with Earth’s and set off a geomagnetic storm: auroras far from the poles, and in strong storms trouble for power grids, satellites and GPS. Arrival times are model forecasts and are often off by six hours or more. Live outlook: aurora forecast.

Did you know?

Solar wind monitors. Spacecraft about 1.5 million km sunward of Earth measure the solar wind before it arrives, giving about 15 to 60 minutes of warning.

Data: NASA DONKI (WSA-ENLIL model).

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