NOAA SWPC / CAPTURE HISTORY
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Latest captured source record. This is an archive, not a current warning service.
Open the detailed event record ↗- 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: 5426 · Valid From: 2026 Oct 05 0155 UTC · Now Valid Until: 2026 Oct 06 0600 UTC · Warning Condition: Persistence · NOAA Space Weather Scale descriptions can be found at · www.swpc.noaa.gov/noaa-scales-explanation
Read original source ↗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.
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: 5426 · Valid From: 2026 Oct 05 0155 UTC · Now Valid Until: 2026 Oct 06 0600 UTC · Warning Condition: Persistence · NOAA Space Weather Scale descriptions can be found at · www.swpc.noaa.gov/noaa-scales-explanation
Source issued/updated 2026-10-05T21:11:06.667Z · Published bulletin
Source for this capture ↗