Solar Storms at CME Halo
Reported by SOHO LASCO 188 days ago.
What the source measured
SOHO LASCO reported: Coronal Mass Ejection detected at 2026-03-20T12:23Z. Linear speed: 827 km/s. Half-angle: 25°. Full halo CME — potential global geomagnetic impact. CME visible to the west in STEREO A COR2 and as a partial halo in SOHO LASCO C2/C3 and GOES CCOR-1. Overlaps in the field of view with CME: 2026-03-20T12:38Z. The source is likely farsided, and believ
How we know
One source: SOHO LASCO. Not yet confirmed by a second, independent source.
Our own score for this event is 15 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 | Medium |
| Calamity Score (ours) | 15 / 100 |
| Legacy data-support index | 0.50/1 |
| Coordinates | 0.0000, 0.0000 |
| Timestamp | 2026-03-20T12:23:00.000Z |
| Source | https://kauai.ccmc.gsfc.nasa.gov/DONKI/view/CME/45193/-1 |
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: soho_lasco. Occurrence: 2026-03-20T12:23:00.000Z.
First archived: 2026-03-24T04:16:47.311Z. 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
| ActivityId | 2026-03-20T12:23:00-CME-001 |
| SpeedKms | 827 |
| HalfAngleDeg | 25 |
| IsHalo | true |
| EarthDirected | false |
| EventType | cme |
| Note | CME visible to the west in STEREO A COR2 and as a partial halo in SOHO LASCO C2/C3 and GOES CCOR-1. Overlaps in the field of view with CME: 2026-03-20T12:38Z. The source is likely farsided, and believed to likely be a separate CME from CME: 2026-03-20T12:38Z based on its appearance in STEREO A COR2 |
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.