Tag: k_index_7

NOAA Issues G3 Geomagnetic Storm Warning

4 Jul 2026 1:03 a.m. · Source: NOAA

NOAA warns of a G3 - Greater geomagnetic storm with a K-index of 7 or higher, effective from July 4, 2026, 05:00 UTC, until July 5, 2026, 12:00 UTC. This space weather event could affect technology.

Science & Technology World Astronomy and Space NOAA Geomagnetic Storm Space Weather K-index 7 G3 Warning Astronomy Science Solar Flares