May 2024 solar storms
VIIRS image showing the aurora borealis over the Northern Hemisphere on 10–11 May. | |
| Associated solar active region | |
|---|---|
| NOAA region no. | 13664 |
| Largest SXR flares | X8.7 |
| G5 "Extreme" geomagnetic storm | |
| G-scale (NOAA/SWPC) | |
| Initial onset | 10 May 2024 |
| Peak onset | 11 May 2024 |
| Dissipated | 13 May 2024 |
| Highest Kp-index | 9 |
| Highest Ap-index | 271 |
| Lowest Dst | −412 nT |
Part of solar cycle 25 | |
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The solar storms of May 2024 were a series of powerful solar storms with extreme solar flares and geomagnetic storm components that occurred from 10 to 13 May 2024 during solar cycle 25. They are also known as the 2024 Mother's Day solar storm or the Gannon storm (after space physicist Jennifer Gannon). The geomagnetic storm was the most powerful to affect Earth since March 1989, and produced aurorae at far more equatorial latitudes than usual in both the Northern and Southern Hemispheres.