Space Weather Events
Coronal mass ejection — 2026-09-28 14:36 UTC
Bright loop CME first seen to the West by SOHO LASCO C2 beginning at 2026-09-28T14:36Z, as well as by SOHO LASCO C3 and GOES CCOR-1, as well as to the East in STEREO A COR2 in later frames. The source of this event is a very large filament eruption seen stretching from approx. S10W50 to N45W50 (centered at approx. N27W50) with liftoff beginning at approx. 2026-09-28T13:51Z as seen in SDO AIA, STEREO A EUVI and GOES SUVI 304. Post eruptive arcades, dimming and wide field line opening can be seen in SDO AIA 171/193/211, GOES SUVI 284 and STEREO A EUVI 195.
| Event type | Coronal mass ejection |
|---|---|
| Date | |
| Flare class | — |
| CME speed | 501 km/s |
| CME analyses | 2 |
| 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) | 2026-09-28T22:46Z | 447 | 45 | 15 / 29 | S | SWPC_CAT | Shock arrival 2026-10-02T03:15Z; Earth glancing blow: no run (opens in a new tab) |
| #2 (opens in a new tab) Most accurate (DONKI) | 2026-09-28T21:34Z | 501 | 45 | 14 / 40 | C | SWPC_CAT | Shock arrival 2026-10-02T02:39Z; 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
- 20260928-AL-002 (opens in a new tab) 2026-09-28T18:21Z
- 20260929-AL-001 (opens in a new tab) 2026-09-29T01:01Z
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 | 1e51b35b-19b4-5882-986e-28b59315aa68 |
Local observation history
What this site observed; not complete provider history.
- — Added