Space Weather Events
Coronal mass ejection — 2026-10-20 01:26 UTC
CME first seen to the NNW in SOHO LASCO C2 starting at 2026-10-20T01:26Z. It is also seen to the NNW in SOHO LASCO C3 and GOES CCOR-1 and to the NW in STEREO A COR2. The source of this CME is most likely far-sided due to a lack of source candidates on the Earth-facing disk. Some very faint field line movement beyond the N limb in GOES SUVI 284 that may be related is visible beginning around 2026-10-19T23:00Z. A far-sided source is consistent with triangulated measurements.
| Event type | Coronal mass ejection |
|---|---|
| Date | |
| Flare class | — |
| CME speed | 368 km/s |
| CME analyses | 1 |
| Linked events | — |
| Instruments | SOHO: LASCO/C2, SOHO: LASCO/C3, STEREO A: SECCHI/COR2, GOES: CCOR-1 |
Research information from NASA DONKI, not an operational warning. NOAA SWPC is the official US source of space weather forecasts.
CME analyses
| Analysis | Time at 21.5 R☉ (UTC) | Speed (km/s) | Half angle (°) | Lat / lon (°) | Type | Technique | Model runs (WSA-ENLIL) |
|---|---|---|---|---|---|---|---|
| #1 (opens in a new tab) Most accurate (DONKI) | 2026-10-20T10:15Z | 368 | 28 | 25 / 172 | S | SWPC_CAT | — |
Analyses are measurements and modelled predictions submitted to DONKI; the "most accurate" mark is DONKI's own.
Provenance
| Source | NASA DONKI — Space Weather Events |
|---|---|
| Feed | DONKI CME |
| Provider data as of | not stated |
| First observed here | 20 Oct 2026, 11:48 EDT |
| Last observed here | 13 Nov 2026, 19:00 EST |
| In latest snapshot | Yes |
| Record identifier | 2071c063-865a-5b6f-b35e-ea486786bee7 |
Local observation history
What this site observed; not complete provider history.
- — Added