Magnetic storms September 24, 2026: what strength will the storm

On Thursday, September 24, the second magnetic storm of this autumn is expected on Earth. According to the Solar Astronomy Laboratory of IKI RAS and ISZF SB RAS, the probability of a geomagnetic storm is estimated at 65%. The probability of a calm state of the magnetosphere is 15%.

The cause of the upcoming perturbation will be a large coronal hole on the Sun. It stretches from the south pole of the star to the equator. Earth will be affected by a stream of fast solar wind that comes out of this area.

The magnetic storm is expected to reach G1 level, a weak entry-level storm. The upcoming storm will be the second in autumn. The first was recorded on September 8 and also referred to a weak level.

Experts estimate the total flare activity of the Sun in the coming days as low.