Space Weather Events
Coronal mass ejection — 2026-10-23 04:18 UTC
This CME is visible to the northwest in SOHO LASCO C2/C3 and GOES CCOR-1, and to the north in STEREO A COR2 imagery. The source is a C1.3 flare and eruption from Active Region 14557 (centered near N10W90) starting around 2026-10-23T03:45Z as seen in SDO AIA 131/171/193/304, GOES SUVI 131/171/195/284/304, and STEREO A EUVI 195/304 imagery. An opening of field lines is visible over the northwest limb in SDO AIA 171/193 and GOES SUVI 171/195/284 imagery at this time as well.
| Event type | Coronal mass ejection |
|---|---|
| Date | |
| Flare class | — |
| CME speed | 597 km/s |
| CME analyses | 1 |
| Linked events | 2026-10-23T03:43:00-FLR-001 |
| 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) | 2026-10-23T10:04Z | 597 | 26 | 36 / 71 | C | SWPC_CAT | 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.
Notifications sent
- 20261023-AL-001 (opens in a new tab) 2026-10-23T12:51Z
Provenance
| Source | NASA DONKI — Space Weather Events |
|---|---|
| Feed | DONKI CME |
| Provider data as of | not stated |
| First observed here | 23 Oct 2026, 20:00 EDT |
| Last observed here | 13 Nov 2026, 19:00 EST |
| In latest snapshot | Yes |
| Record identifier | 2c4373f5-70aa-58e6-af1f-ea4145369513 |
Local observation history
What this site observed; not complete provider history.
- — Added