Solar Storms at G3 Geomagnetic Storm Watch
Reported by SWPC 73 days ago.
What the source measured
SWPC reported: Space Weather Message Code: ALTK07 Serial Number: 218 Issue Time: 2026 Jul 04 0509 UTC ALERT: Geomagnetic K-index of 7 Threshold Reached: 2026 Jul 04 0509 UTC Synoptic Period: 0300-0600 Active Warning: YES Noaa Scale: G3 - Strong Comment: NOAA Scale: G3 - Strong
How we know
One source: SWPC. Not yet confirmed by a second, independent source.
Our own score for this event is 56 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Solar Storms |
| Severity | High |
| Calamity Score (ours) | 56 / 100 |
| Legacy data-support index | 0.61/1 |
| Coordinates | 0.0000, 0.0000 |
| Timestamp | 2026-07-04T03:10:10.740Z |
| Source | https://www.swpc.noaa.gov/products/alerts-watches-and-warnings |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: swpc. Occurrence: 2026-07-04T03:10:10.740Z.
First archived: 2026-07-05T00:23:52.743Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Scale | G3 |
| KpIndex | 7 |
| CurrentKp | 0 |
| GLevel | 3 |
| PowerGridRisk | moderate |
| GpsRisk | degraded |
| RadioRisk | intermittent |
| HighRiskRegions | ["High-latitude regions (>50°)"] |
| EventType | geomagnetic_storm |
Cascade Risks
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
Series begins 8 March 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.