Space Weather Events
Coronal mass ejection — 2026-10-20 09:09 UTC
CME first seem to the NW in STEREO A COR2 starting at 2026-10-20T09:09Z. It is also seen to the NNW in SOHO LASCO C2 and GOES CCOR-1 but is covered by a real-time data gap in SOHO LASCO C3. The source of this CME is most likely far-sided due to a lack of source candidates. A far-sided source is consistent with triangulated measurements.
| Event type | Coronal mass ejection |
|---|---|
| Date | |
| Flare class | — |
| CME speed | 568 km/s |
| CME analyses | 1 |
| Linked events | — |
| Instruments | STEREO A: SECCHI/COR2, SOHO: LASCO/C2, SOHO: LASCO/C3, 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) | 2026-10-20T15:19Z | 568 | 38 | 28 / 172 | C | SWPC_CAT | Shock arrival not predicted; Earth glancing blow: no run (opens in a new tab) Shock arrival not predicted; Earth glancing blow: no run (opens in a new tab) |
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 | be94b90c-bc82-5741-a65a-177efc1e104c |
Local observation history
What this site observed; not complete provider history.
- — Added