Space weather / EVENT RECORD

WARNING: Geomagnetic K-index of 4 expected

NOAA SWPC · Every measurement below belongs to the selected record.

Bulletin issued

2026-10-09 01:29:51.387Z

Source update / publication

2026-10-09 01:29:51.387Z

WARNING: Geomagnetic K-index of 4 expected · Valid From: 2026 Oct 09 0128 UTC · Valid To: 2026 Oct 10 0600 UTC · Warning Conditions: Onset · Comment: · NOAA Space Weather Scale descriptions can be found at · www.swpc.noaa.gov/noaa-scales-explanation

This is a source-linked archive. Source measurements and assessments can change. An archived bulletin is not evidence that a warning is currently active.

In the daily journal

SOURCE ID swpc:K04W:2026-10-09T01:29:51.387Z