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G3 Strong — Warning: Geomagnetic K-index of 7 or greater expected
Reported by NOAA Space Weather Prediction Center Alerts, NOAA Space Weather Prediction Center Alerts, NOAA Space Weather Prediction Center Alerts
NOAA SWPC reported a G3 Strong geomagnetic alert after the K-index reached 7. The source lists the warning as active.
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Why it matters
The alert records a geomagnetic K-index threshold of 7 and an active warning.
Update history
NOAA SWPC reported a G3 Strong geomagnetic alert after the K-index reached 7. The source lists the warning as active.
NOAA SWPC reported an active G3 (Strong) alert after the geomagnetic K-index reached 7 at 17:58 UTC on October 10, 2026. The supplied notice does not specify impacts or protective actions.
Generated scores
Scores are based on the cited reporting and use a 1–10 scale. Read the methodology.
- Confidence
- 8/10
- Geographic reach
- 1/10
- Global importance
- 2/10
- Impact magnitude
- 3/10
- Positivity
- 5/10
- Urgency
- 5/10
Primary official sources
- NOAA Space Weather Prediction Center AlertsG3 Strong — Warning: Geomagnetic K-index of 7 or greater expectedNOAA/NWS Space Weather Prediction Center Usage terms
- NOAA Space Weather Prediction Center AlertsG3 Strong — Alert: Geomagnetic K-index of 7NOAA/NWS Space Weather Prediction Center Usage terms
- NOAA Space Weather Prediction Center AlertsG3 Strong — Alert: Geomagnetic K-index of 7NOAA/NWS Space Weather Prediction Center Usage terms
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