Space Weather Events
Coronal mass ejection — 2026-10-21 08:53 UTC
CME first seen to the East by STEREO A COR2 beginning at 2026-10-21T08:53Z, as well as by SOHO LASCO C2/C3 and GOES CCOR-1 in later frames. The source of this event is a small eruption seen centered at approx. N40E05 beginning at approx. 2026-10-21T08:15Z as seen in SDO AIA 193. Dimming signatures extending to the Southeast (approx. N20E25) seen in SDO AIA 193 and proximity to a small coronal hole indicate a potential strong SE deflection of this event.
| Event type | Coronal mass ejection |
|---|---|
| Date | |
| Flare class | — |
| CME speed | 310 km/s |
| CME analyses | 2 |
| Linked events | 2026-10-25T12:20:00-IPS-001 |
| 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) | 2026-10-22T00:31Z | 233 | 33 | 15 / -35 | S | SWPC_CAT | — |
| #2 (opens in a new tab) Most accurate (DONKI) | 2026-10-21T21:10Z | 310 | 35 | 17 / -33 | S | SWPC_CAT | Shock arrival 2026-10-25T06:00Z; 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 | 21 Oct 2026, 15:52 EDT |
| Last observed here | 13 Nov 2026, 19:00 EST |
| In latest snapshot | Yes |
| Record identifier | 049a9f43-e360-565d-9bb2-bc79604044e8 |
Local observation history
What this site observed; not complete provider history.
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