NOAA SWPC / Event history

WARNING: Geomagnetic K-index of 4 expected

WARNING: Geomagnetic K-index of 4 expected · Valid From: 2026 Oct 21 0204 UTC · Valid To: 2026 Oct 21 1200 UTC · Warning Conditions: Onset · Comment: · NOAA Space Weather Scale descriptions can be found at · www.swpc.noaa.gov/noaa-scales-explanation

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Bulletin issued: 21 October 2026 at 02:05 UTC
First saved by us: 21 October 2026 at 02:10 UTC
Last included in a daily record: 21 October 2026
The linked daily edition preserves what we captured that UTC day; this event page is not a live warning.
Source classification: WARNING · Published bulletin

A recent feed check does not mean a new observation. This page preserves source records; it does not establish current safety or warning status.

The saved record

What changed

0 updates · 1 first record

Each update compares two versions we saved. This may not include every update from the source. A missing report does not mean an event has ended.

First saved record · 21 October 2026 at 02:10 UTC

Saved by us

21 October 2026 at 02:10 UTC

Starting point

First saved record

Our first saved version of WARNING: Geomagnetic K-index of 4 expected. We have no earlier saved version to compare.

Bulletin issued: 21 October 2026 at 02:05 UTC

View saved version 1

Original saved fields, unchanged. This is our record, not an archived copy of the external webpage.

{
  "id": "swpc:K04W:2026-10-21T02:05:20.267Z",
  "category": "solar",
  "title": "WARNING: Geomagnetic K-index of 4 expected",
  "occurredAt": "2026-10-21T02:05:20.267Z",
  "issuedAt": "2026-10-21T02:05:20.267Z",
  "timeBasis": "Bulletin issued",
  "place": "Space weather",
  "coordinates": null,
  "severity": "WARNING",
  "status": "Published bulletin",
  "summary": "WARNING: Geomagnetic K-index of 4 expected · Valid From: 2026 Oct 21 0204 UTC · Valid To: 2026 Oct 21 1200 UTC · Warning Conditions: Onset · Comment: · NOAA Space Weather Scale descriptions can be found at · www.swpc.noaa.gov/noaa-scales-explanation",
  "url": "https://www.swpc.noaa.gov/products/alerts-watches-and-warnings",
  "source": "swpc",
  "sourceName": "NOAA SWPC",
  "revision": "3efe9d6b49c296affd6ed50e4af852819965a9ca173605e47d476e44c13940c5"
}

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