Space weather / EVENT RECORD

WARNING: Geomagnetic K-index of 4 expected

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

Bulletin issued

2026-10-05 01:56:45.643Z

Source update / publication

2026-10-05 01:56:45.643Z

WARNING: Geomagnetic K-index of 4 expected · Valid From: 2026 Oct 05 0155 UTC · Valid To: 2026 Oct 05 2359 UTC · Warning Conditions: Persistence · 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:2026-10-05T01:56:45.643Z