K-index of 4 – Geomagnetic Storm Alert issued on May 19
A Geomagnetic K-index of 4 Alert was issued on May 19, 2026, valid from 06:00 UTC to 09:00 UTC. Weak power grid fluctuations may occur.
Geomagnetic storms
G1 – Minor Geomagnetic Storm Watch issued for May 18 and 19, 2026
A G1 – Minor Geomagnetic Storm Watch is in effect for May 18 and May 19, 2026. The Watch was issued at 16:12 UTC on May 17, 2026.
G1 – Minor Geomagnetic Storm Watch issued for May 17 and 18, 2026
A G1 – Minor Geomagnetic Storm Watch is in effect for May 17 and 18, 2026. The highest predicted storm level is G1 on both days.
G1 – Minor Geomagnetic Storm Alert issued on May 16, 2026
A G1 – Minor Geomagnetic Storm Alert was issued on May 16, 2026 after the K-index reached 5 at 17:59 UTC.
G1 – Minor Geomagnetic Storm Alert issued on May 16, 2026
A G1 – Minor Geomagnetic Storm Alert was issued for May 16, 2026. Threshold was reached at 08:59 UTC during the 0600-0900 UTC period.
G1 – Minor Geomagnetic Storm Alert issued on May 16, 2026
A G1 – Minor Geomagnetic Storm Alert was issued for May 16, 2026. The threshold was reached at 05:54 UTC and the alert is currently active.
G2 – Moderate Geomagnetic Storm Alert issued on May 15, 2026
A G2 – Moderate Geomagnetic Storm Alert was issued for May 15, 2026. The alert is active from 21:00 UTC to 24:00 UTC.
G1 – Minor Geomagnetic Storm Alert issued on May 15, 2026
A G1 – Minor Geomagnetic Storm Alert was issued on May 15, 2026. The Alert is active for the synoptic period 15:00–18:00 UTC.
G1 – Minor Geomagnetic Storm Alert issued on May 15
A G1 – Minor Geomagnetic Storm Alert was issued on May 15, 2026. The alert is valid for the synoptic period 1200–1500 UTC.
Geomagnetic K-index of 4 – Alert issued on May 15, 2026
A Geomagnetic K-index of 4 Alert was issued on May 15, 2026, valid between 12:00 and 15:00 UTC. Active warning is in effect.
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