Space Weather Events
Last checked 43 minutes ago.
Research information from NASA DONKI, not an operational space weather warning service.
Showing 21–40 of 113 records
Coronal mass ejection — 2026-09-20 03:00 UTC
Type S (SCORE scale, most accurate analysis)
- Event type
- Coronal mass ejection
- Date
- CME speed (most accurate analysis)
- 273 km/s
Faint CME observed to the NE in SOHO LASCO C2/C3 and GOES CCOR-1, better seen the further into the field-of-view it travels than early C2. No definitive EUV source is observed, and may be far-sided or outflow following…
View on DONKI for Coronal mass ejection — 2026-09-20 03:00 UTC (opens in a new tab)Coronal mass ejection — 2026-09-20 05:12 UTC
Type C (SCORE scale, most accurate analysis)
- Event type
- Coronal mass ejection
- Date
- CME speed (most accurate analysis)
- 593 km/s
Faint CME observed to the NW in SOHO LASCO C2/C3 and GOES CCOR-1, not observed in STEREO A COR2. No distinct source is observed for this CME, but could be related to field line movement over the NW limb starting as…
View on DONKI for Coronal mass ejection — 2026-09-20 05:12 UTC (opens in a new tab)Coronal mass ejection — 2026-09-20 12:23 UTC
Type S (SCORE scale, most accurate analysis)
- Event type
- Coronal mass ejection
- Date
- CME speed (most accurate analysis)
- 427 km/s
Faint CME observed to the W only in STEREO A COR2. No distinct source is observed in available EUV imagery.
View on DONKI for Coronal mass ejection — 2026-09-20 12:23 UTC (opens in a new tab)Coronal mass ejection — 2026-09-20 20:12 UTC
Type S (SCORE scale, most accurate analysis)
- Event type
- Coronal mass ejection
- Date
- CME speed (most accurate analysis)
- 277 km/s
Faint CME observed to the NW in SOHO LASCO C2/C3. The CME is not visible in STEREO A COR2 (may be too faint) or GOES CCOR-1 (likely pylon obscured). No distinct EUV source is observed for this CME.
View on DONKI for Coronal mass ejection — 2026-09-20 20:12 UTC (opens in a new tab)Coronal mass ejection — 2026-09-20 22:38 UTC
Type S (SCORE scale, most accurate analysis)
- Event type
- Coronal mass ejection
- Date
- CME speed (most accurate analysis)
- 318 km/s
Faint CME observed to the NW in STEREO A COR2 and SOHO LASCO C2/C3, not in GOES CCOR-1 as it is likely obscured by the pylon. The only potential source is a slow brightening on the NW disk of STEREO A EUVI 195 starting…
View on DONKI for Coronal mass ejection — 2026-09-20 22:38 UTC (opens in a new tab)Coronal mass ejection — 2026-09-21 09:09 UTC
Type S (SCORE scale, most accurate analysis)
- Event type
- Coronal mass ejection
- Date
- CME speed (most accurate analysis)
- 347 km/s
Faint CME observed to the NW in STEREO A COR2 and SOHO LASCO C2/C3, largely blocked by the pylon in GOES CCOR-1. The source is unclear, with a potential far-sided source on the STEREO A EUVI 195/304 west limb observed…
View on DONKI for Coronal mass ejection — 2026-09-21 09:09 UTC (opens in a new tab)Coronal mass ejection — 2026-09-24 02:53 UTC
Type C (SCORE scale, most accurate analysis)
- Event type
- Coronal mass ejection
- Date
- Source location / observed at
- N03W32
- CME speed (most accurate analysis)
- 500 km/s
CME observed to the E only in STEREO A COR2, likely not seen in other coronagraphs due to the occulting disk and/or faint leading edge. The start time of 2026-09-24T02:53Z in white light is later than the first…
View on DONKI for Coronal mass ejection — 2026-09-24 02:53 UTC (opens in a new tab)Coronal mass ejection — 2026-09-24 09:23 UTC
Type C (SCORE scale, most accurate analysis)
- Event type
- Coronal mass ejection
- Date
- CME speed (most accurate analysis)
- 618 km/s
Faint CME observed to the SW only in STEREO A COR2, may be due to faintness or the occulting disk in other coronagraphs. No EUV source is observed for this front.
View on DONKI for Coronal mass ejection — 2026-09-24 09:23 UTC (opens in a new tab)Coronal mass ejection — 2026-09-24 14:45 UTC
Type S (SCORE scale, most accurate analysis)
- Event type
- Coronal mass ejection
- Date
- Source location / observed at
- S35W70
- CME speed (most accurate analysis)
- 493 km/s
CME observed to the SW in GOES CCOR-1 and S in STEREO A COR2, overlapping with a slow, wide streamer blowout beginning ~2026-09-23T20:12Z (itself measuring ~176 km/s). Not observed in SOHO LASCO C2/C3 due to a real-time…
View on DONKI for Coronal mass ejection — 2026-09-24 14:45 UTC (opens in a new tab)Coronal mass ejection — 2026-09-25 11:09 UTC
Type C (SCORE scale, most accurate analysis)
- Event type
- Coronal mass ejection
- Date
- CME speed (most accurate analysis)
- 797 km/s
CME visible to the NE in SOHO LASCO C2/C3 and GOES CCOR-1. The CME is also visible to the NW in STEREO A COR2. The source is farsided, and is best seen as rapidly opening field lines beyond the west limb in STEREO A EUV…
View on DONKI for Coronal mass ejection — 2026-09-25 11:09 UTC (opens in a new tab)Coronal mass ejection — 2026-09-25 11:23 UTC
Type C (SCORE scale, most accurate analysis)
- Event type
- Coronal mass ejection
- Date
- Source location / observed at
- S40W80
- CME speed (most accurate analysis)
- 745 km/s
Narrow CME with a pointy front seen in STEREO A COR2 only. This CME partially overlaps in coronagraphs with the far-sided 2026-09-25T11:09Z CME and its shock. The only potential candidate source is a filament liftoff…
View on DONKI for Coronal mass ejection — 2026-09-25 11:23 UTC (opens in a new tab)Coronal mass ejection — 2026-09-25 15:12 UTC
Type C (SCORE scale, most accurate analysis)
- Event type
- Coronal mass ejection
- Date
- CME speed (most accurate analysis)
- 524 km/s
Faint loop front in the wake of 2026-09-25T11:09Z CME, overlapping with outflow from this earlier far-sided CME. The front is faintly seen in SOHO LASCO C2/C3 and GOES CCOR-1 to the NE. There is a super faint, possibly…
View on DONKI for Coronal mass ejection — 2026-09-25 15:12 UTC (opens in a new tab)Coronal mass ejection — 2026-09-25 17:45 UTC
Type S (SCORE scale, most accurate analysis)
- Event type
- Coronal mass ejection
- Date
- CME speed (most accurate analysis)
- 462 km/s
Faint CME that looks to consist of two loops moving together as one. It is seen faintly to the NE in GOES CCOR-1 and SOHO LASCO C3 difference imagery, moving in the footsteps of 2026-09-25T11:09Z CME. No coronal…
View on DONKI for Coronal mass ejection — 2026-09-25 17:45 UTC (opens in a new tab)Coronal mass ejection — 2026-09-25 20:06 UTC
Type S (SCORE scale, most accurate analysis)
- Event type
- Coronal mass ejection
- Date
- CME speed (most accurate analysis)
- 254 km/s
A minor, narrow CME seen to the E in GOES CCOR-1/SOHO LASCO C3. It is not seen in STEREO A COR2. No coronal signatures have been found for this CME in EUV imagery.
View on DONKI for Coronal mass ejection — 2026-09-25 20:06 UTC (opens in a new tab)Coronal mass ejection — 2026-09-25 20:45 UTC
Type S (SCORE scale, most accurate analysis)
- Event type
- Coronal mass ejection
- Date
- CME speed (most accurate analysis)
- 460 km/s
A narrow CME seen to the NE in GOES CCOR-1/SOHO LASCO C3 with a pointed front. It is not seen in STEREO A COR2 and SOHO LASCO C2 currently because of a data gap. No coronal signatures have been found for this CME in EUV…
View on DONKI for Coronal mass ejection — 2026-09-25 20:45 UTC (opens in a new tab)Coronal mass ejection — 2026-09-25 23:00 UTC
Type S (SCORE scale, most accurate analysis)
- Event type
- Coronal mass ejection
- Date
- CME speed (most accurate analysis)
- 472 km/s
CME first seen to the NE by SOHO LASCO C2 beginning at 2026-09-25T23:00Z, as well as by SOHO LASCO C3, and GOES CCOR-1. This CME is either too faint or is obscured by the occulting disk in STEREO A COR2. The source of…
View on DONKI for Coronal mass ejection — 2026-09-25 23:00 UTC (opens in a new tab)Coronal mass ejection — 2026-09-26 00:48 UTC
Type S (SCORE scale, most accurate analysis)
- Event type
- Coronal mass ejection
- Date
- CME speed (most accurate analysis)
- 478 km/s
Faint CME first seen to the NE by SOHO LASCO C2 beginning at 2026-09-26T00:48Z, as well as by SOHO LASCO C3, STEREO A COR2 and GOES CCOR-1. There is no clear source for this event as it is likely far sided.
View on DONKI for Coronal mass ejection — 2026-09-26 00:48 UTC (opens in a new tab)Coronal mass ejection — 2026-09-26 02:24 UTC
Type S (SCORE scale, most accurate analysis)
- Event type
- Coronal mass ejection
- Date
- CME speed (most accurate analysis)
- 417 km/s
Faint CME first seen to the NE by SOHO LASCO C2 beginning at 2026-09-26T02:24Z, as well as by SOHO LASCO C3 and STEREO A COR2 in later frames. This CME is obscured by Earthshine in GOES CCOR-1. There is no clear source…
View on DONKI for Coronal mass ejection — 2026-09-26 02:24 UTC (opens in a new tab)Coronal mass ejection — 2026-09-26 15:24 UTC
Type S (SCORE scale, most accurate analysis)
- Event type
- Coronal mass ejection
- Date
- CME speed (most accurate analysis)
- 449 km/s
Faint minor CME with a pointy front seen to the NE in SOHO LASCO C2/C3 and GOES CCOR-1 but not seen in STEREO A COR2 coronagraph.
View on DONKI for Coronal mass ejection — 2026-09-26 15:24 UTC (opens in a new tab)Coronal mass ejection — 2026-09-26 19:36 UTC
Type S (SCORE scale, most accurate analysis)
- Event type
- Coronal mass ejection
- Date
- Source location / observed at
- S20W135
- CME speed (most accurate analysis)
- 427 km/s
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…
View on DONKI for Coronal mass ejection — 2026-09-26 19:36 UTC (opens in a new tab)
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Coverage of this source
- NASA DONKI — Space Weather Events: DONKI events in the look-back window (30 days by default), re-read every hour; older entries remain from earlier refreshes or an optional backfill.
NASA DONKI — Space Weather Events
Source: Data: NASA Community Coordinated Modeling Center (CCMC), DONKI; analyses by the Moon to Mars Space Weather Analysis Office. Last successful refresh: 13 Oct 2026, 10:20 EDT.
- DONKI information is supplied for research and analysis. It is not an operational emergency-warning service: NOAA's Space Weather Prediction Center (swpc.noaa.gov) is the official US source of space weather forecasts and warnings.
- Observations, analyses (a CME can have several, with the one DONKI marks most accurate), model predictions (WSA-ENLIL) and notifications are shown as such, in their original units and classifications. No combined severity score is computed.
- Times are UTC as supplied. DONKI revises entries; the look-back window is re-read on every refresh.