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EXTENDED WARNING: Geomagnetic K-index of 4 expected

Latest captured source record. This is an archive, not a current warning service.

First tracked
2026-10-09 17:11:48.776Z
Last seen in a feed
2026-10-09 18:14:52.349Z
Source classification
Bulletin · Published bulletin

EXTENDED WARNING: Geomagnetic K-index of 4 expected · Extension to Serial Number: 5417 · Valid From: 2026 Sep 15 1849 UTC · Now Valid Until: 2026 Sep 16 1800 UTC · Warning Condition: Persistence · NOAA Space Weather Scale descriptions can be found at · www.swpc.noaa.gov/noaa-scales-explanation

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How the record changed

Only changes captured by this journal are listed; this is not the authority’s complete history. Timestamps distinguish publication from our capture. Missing messages are never treated as cancellations.

  1. baseline · Captured 2026-10-09 17:11:48.776Z

    EXTENDED WARNING: Geomagnetic K-index of 4 expected

    EXTENDED WARNING: Geomagnetic K-index of 4 expected · Extension to Serial Number: 5417 · Valid From: 2026 Sep 15 1849 UTC · Now Valid Until: 2026 Sep 16 1800 UTC · Warning Condition: Persistence · NOAA Space Weather Scale descriptions can be found at · www.swpc.noaa.gov/noaa-scales-explanation

    Source issued/updated 2026-09-16T05:38:03.320Z · Published bulletin

    Source for this capture ↗