NOAA SWPC / CAPTURE HISTORY
ALERT: Geomagnetic K-index of 4
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
- ALERT · Published bulletin
ALERT: Geomagnetic K-index of 4 · Threshold Reached: 2026 Oct 04 0757 UTC · Synoptic Period: 0600-0900 · Active Warning: YES · Comment: · NOAA Space Weather Scale descriptions can be found at · www.swpc.noaa.gov/noaa-scales-explanation
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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
ALERT: Geomagnetic K-index of 4
ALERT: Geomagnetic K-index of 4 · Threshold Reached: 2026 Oct 04 0757 UTC · Synoptic Period: 0600-0900 · Active Warning: YES · Comment: · NOAA Space Weather Scale descriptions can be found at · www.swpc.noaa.gov/noaa-scales-explanation
Source issued/updated 2026-10-04T08:01:06.560Z · Published bulletin
Source for this capture ↗