Space Weather Events
Coronal mass ejection — 2026-10-31 05:00 UTC
CME first seen to the West by SOHO LASCO C2 beginning at 2026-10-31T05:00Z, as well as by SOHO LASCO C3 and GOES CCOR-1 in later frames. This CME is not clearly seen in STEREO A COR2, as it may be obscured by the pylon or too faint to view clearly. The source of this event is an eruption from former AR 14561 (S11W140) beginning at approx. 2026-10-31T04:30Z as seen in STEREO A EUVI 195. Brightening near the region and dimming extending Northward can be seen in association with this eruption, possibly suggesting a Northern deflection.
| Event type | Coronal mass ejection |
|---|---|
| Date | |
| Flare class | — |
| CME speed | 345 km/s |
| CME analyses | 1 |
| Linked events | — |
| Instruments | 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) | 2026-10-31T14:53Z | 345 | 24 | 0 / 140 | 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 | 31 Oct 2026, 20:00 EDT |
| Last observed here | 13 Nov 2026, 19:00 EST |
| In latest snapshot | Yes |
| Record identifier | a38d9299-f9b4-58e2-9827-57e213baf37f |
Local observation history
What this site observed; not complete provider history.
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