Space Weather Events
Coronal mass ejection — 2026-09-26 19:36 UTC
Bright lightbulb-shaped CME seen to the SW in SOHO LASCO C2/C3, GOES CCOR-1 and STEREO A COR2. Its source is a large prominence seen lifting from behind the SW limb starting at 2026-09-26T18:28Z (best seen in GOES SUVI 304), with source location seen on disk, close to the SW limb in STEREO A EUV 304/195 imagery. In EUV A 195 imagery we see an ejecta, as well as dimming and bright post-eruptive arcades. The erupting filament is also seen in AIA 171 and faintly in AIA 304, and ejecta and opening of field lines are seen off/close behind the SW limb in GOES SUVI 286. The erupting filament stretches very approximately from ~S25W15 (mostly dimming) to ~S20W80 (ejecta and post-eruptive arcades), as seen from STEREO A perspective, so the filament can be estimated as centered very approximately at ~S20W135 from the SDO perspective.
| Event type | Coronal mass ejection |
|---|---|
| Date | |
| Flare class | — |
| CME speed | 427 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) | 2026-09-27T03:30Z | 427 | 34 | -20 / 120 | S | 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.
Provenance
| Source | NASA DONKI — Space Weather Events |
|---|---|
| Feed | DONKI CME |
| Provider data as of | not stated |
| First observed here | 12 Oct 2026, 20:02 EDT |
| Last observed here | 13 Oct 2026, 20:56 EDT |
| In latest snapshot | Yes |
| Record identifier | d47e2bc0-ff31-5f91-83d7-96a9f83efd6a |
Local observation history
What this site observed; not complete provider history.
- — Added