Tag: g3

NOAA Warns of G3 Geomagnetic Storm as K-Index 7 Expected

10 Oct 2026 1:43 p.m. · Source: NOAA

NOAA issues a geomagnetic K-index warning for 7 or greater, forecasting a G3 strong storm from 1742 UTC to 2359 UTC on October 10, 2026.

Science & Technology Weather Environment Astronomy and Space General Weather NOAA geomagnetic storm K-index G3 space weather WARK07 Space Weather Prediction Center Solar Flares
NOAA Cancels G3 Geomagnetic Storm Warning Due to Date Error

4 Jul 2026 8:28 p.m. · Source: NOAA

NOAA has canceled a G3-level geomagnetic storm warning (K-index 7 or greater) due to an error in the original alert's expiration date. The warning was intended to end on July 4th.

Science & Technology Weather Astronomy and Space General Weather NOAA Space Weather Geomagnetic Storm Warning Cancellation K-index G3 Solar Flares