Space Weather Events
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Research information from NASA DONKI, not an operational space weather warning service.
Showing 1–20 of 115 records
| Name↕, sortable; sort Name, A to Z | Event type↕, sortable; sort Event type, A to Z | Date↕, sortable; sort Date, earliest first | Flare class↕, sortable; sort Flare class, A to Z | CME speed↕, sortable; sort CME speed (most accurate analysis), lowest first | CME analyses↕, sortable; sort CME analyses, lowest first | Linked events↕, sortable; sort Linked events, A to Z | Instruments↕, sortable; sort Instruments, A to Z | Summary↕, sortable; sort Summary, A to Z |
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| Coronal mass ejection — 2026-09-14 11:08 UTC | Coronal mass ejection | — | 897 km/s | 2 | 2026-09-17T01:24:00-IPS-001, 2026-09-17T15:10:00-IPS-001 | STEREO A: SECCHI/COR2, GOES: CCOR-1 | CME first seen to the E in STEREO A COR2 starting at 2026-09-14T11:08Z. It is also seen to the W in GOES CCOR-1. This CME is covered by a data gap in SOHO LASCO C2/C3 in real time. The source of this CME is an eruption centered around AR 14528 (S11W38) best seen in GOES SUVI 284 beginning around 2026-09-14T10:00Z. Field line movement can be seen accompanied by brightening and ejecta. Post-eruptive arcades can also be seen in SDO AIA 193. There seems to be a northwestward deflection from the location of the source. There are two large coronal holes (a northern and a southern one) nearby, possibly responsible for this deflection. | |
| Coronal mass ejection — 2026-09-14 17:24 UTC | Coronal mass ejection | — | 461 km/s | 1 | — | SOHO: LASCO/C2, SOHO: LASCO/C3, GOES: CCOR-1 | CME observed to the NW in SOHO LASCO C2/C3 and GOES CCOR-1, likely not observed in STEREO A COR2 either due to faintness or a data gap starting at 2026-09-14T18:53Z before it becomes visible. The source is far-sided over the NW limb, observed in SDO AIA 171/193 starting around 2026-09-17T15:48Z as slow, wide field line movement. More directly observed in STEREO A EUVI 195/304 starting as early as 2026-09-14T14:55Z, as brightening and dimming centered around an estimated N30W115 in the NW disk near former Active Regions 14523 and 14521. | |
| Coronal mass ejection — 2026-09-15 08:36 UTC | Coronal mass ejection | — | 395 km/s | 1 | — | SOHO: LASCO/C2 | Very faint CME with an unclear front seen to the NE in early images of SOHO LASCO C2 only. It is not seen in SOHO LASCO C3, STEREO A COR2 and GOES CCOR-1, likely because of its faintness. No source for this feature has been found in EUV imagery. | |
| Coronal mass ejection — 2026-09-18 03:24 UTC | Coronal mass ejection | — | 371 km/s | 1 | — | SOHO: LASCO/C2, SOHO: LASCO/C3, GOES: CCOR-1 | CME visible to the NE in SOHO LASCO C2/C3. The CME is also faintly visible to the NE in GOES CCOR-1 following a data gap due to Earthshine from 2026-09-18T03:45Z to 2026-09-18T06:10Z. The CME is not visible in STEREO A COR2 imagery. The source is beyond the NE limb and is seen as moving field lines starting at 2026-09-18T02:35Z in GOES SUVI 284 and SDO AIA 171/193 imagery. | |
| Coronal mass ejection — 2026-09-19 16:38 UTC | Coronal mass ejection | — | 729 km/s | 1 | — | SOHO: LASCO/C2, STEREO A: SECCHI/COR2, GOES: CCOR-1 | Faint, narrow CME seen to the SW in SOHO LASCO C2 and STEREO A COR2 and very faintly seen in a couple of frames of GOES CCOR-1 coronagraph imagery. The CME is not seen in SOHO LASCO C3. Its source is likely seen in STEREO A EUV 304 imagery as a large ejecta off the W limb after 2026-09-19T15Z and not seen in any other EUV imagery. The ejecta is not clearly visible, and it's exact location/longitude is unclear, but it seems to be close to the limb (which would be ~159 deg). | |
| Coronal mass ejection — 2026-09-19 18:48 UTC | Coronal mass ejection | — | 321 km/s | 1 | 2026-09-19T17:57:00-FLR-001 | SOHO: LASCO/C2 | Faint, minor CME with an unclear front seen to the E-NE in SOHO LASCO C2. Not seen in other coronagraphs. Its source is the long duration C3.3 class flare from unnumbered AR rotating onto disk (N14E90) peaking at 2026-09-19T18:17Z. There is also an associated opening of field lines on/behind the E limb seen in SDO AIA 193 and a minor prominence/ejecta seen in SDO AIA 304/171 starting after 2026-09-19T18:10Z. The initial front is followed by a series of outflows. | |
| Coronal mass ejection — 2026-09-19 22:12 UTC | Coronal mass ejection | — | 331 km/s | 1 | — | SOHO: LASCO/C2, SOHO: LASCO/C3, STEREO A: SECCHI/COR2, GOES: CCOR-1 | CME observed to the NW in SOHO LASCO C2/C3, GOES CCOR-1, and STEREO A COR2. The source is a far-sided filament eruption over the NW limb, observed best in GOES 284/304 starting around 2026-09-19T21:22Z. When STEREO A EUVI 304/195 return from a data gap at 2026-09-20T00:15Z and 2026-09-20T00:25 respectively, dimming and post eruptive brightening can be seen in the NW disk, likely left behind by this filament eruption. | |
| Coronal mass ejection — 2026-09-19 22:24 UTC | Coronal mass ejection | — | 341 km/s | 1 | — | SOHO: LASCO/C2, SOHO: LASCO/C3, STEREO A: SECCHI/COR2, GOES: CCOR-1 | CME observed brightly to the SW in STEREO A COR2, and very faintly to the SE in SOHO LASCO C2/C3 and GOES CCOR-1. No source is seen in on-disk EUV imagery for this event, and is likely far-sided. | |
| Coronal mass ejection — 2026-09-20 03:00 UTC | Coronal mass ejection | — | 273 km/s | 1 | — | SOHO: LASCO/C2, SOHO: LASCO/C3, GOES: CCOR-1 | 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 prior CME: 2026-09-19T18:48Z. | |
| Coronal mass ejection — 2026-09-20 05:12 UTC | Coronal mass ejection | — | 593 km/s | 1 | — | SOHO: LASCO/C2, SOHO: LASCO/C3, GOES: CCOR-1 | 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 early as ~2026-09-20T01:48Z in SDO AIA 171. | |
| Coronal mass ejection — 2026-09-20 12:23 UTC | Coronal mass ejection | — | 427 km/s | 1 | — | STEREO A: SECCHI/COR2 | Faint CME observed to the W only in STEREO A COR2. No distinct source is observed in available EUV imagery. | |
| Coronal mass ejection — 2026-09-20 20:12 UTC | Coronal mass ejection | — | 277 km/s | 1 | — | SOHO: LASCO/C2, SOHO: LASCO/C3 | 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. | |
| Coronal mass ejection — 2026-09-20 22:38 UTC | Coronal mass ejection | — | 318 km/s | 1 | — | STEREO A: SECCHI/COR2, SOHO: LASCO/C2, SOHO: LASCO/C3 | 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 around 2026-09-20T18:55Z. | |
| Coronal mass ejection — 2026-09-21 09:09 UTC | Coronal mass ejection | — | 347 km/s | 1 | — | STEREO A: SECCHI/COR2, SOHO: LASCO/C2, SOHO: LASCO/C3, GOES: CCOR-1 | 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 as brightening and field line movement starting around 2026-09-21T09:05Z, very close to the CME start time however. There are two additional field line movements near the NW limb in SDO AIA 171 starting around 2026-09-21T03:03Z and 2026-09-21T05:54Z, however these eruptions may be too early to be associated with this CME. Triangulation of the leading edge suggests the CME is far-sided. | |
| Coronal mass ejection — 2026-09-24 02:53 UTC | Coronal mass ejection | — | 500 km/s | 1 | — | STEREO A: SECCHI/COR2 | 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 observation at 2026-09-24T01:38Z in running difference imagery due to the bright streamer overlap. The source may be an eruption from AR 14536 centered around N03W32, observed as slow dimming, brightening, and field line movement in SDO AIA 171/193 starting around 2026-09-23T21:06Z. In STEREO A COR2, there is a faint leading edge observed already far in the east field-of-view after a data gap ends at 2026-09-24T01:23Z that better corresponds to this eruption time, but is also plausible to be a candidate source for this CME. | |
| Coronal mass ejection — 2026-09-24 09:23 UTC | Coronal mass ejection | — | 618 km/s | 1 | — | STEREO A: SECCHI/COR2 | 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. | |
| Coronal mass ejection — 2026-09-24 14:45 UTC | Coronal mass ejection | — | 493 km/s | 1 | — | GOES: CCOR-1, STEREO A: SECCHI/COR2 | 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 data gap. The source is field line movement and small shifting of a coronal hole boundary best observed only in GOES SUVI 284 starting ~2026-09-24T14:02Z, tracing on-disk around S35W70 in proximity to a large southern coronal hole. | |
| Coronal mass ejection — 2026-09-25 11:09 UTC | Coronal mass ejection | — | 797 km/s | 3 | — | STEREO A: SECCHI/COR2, SOHO: LASCO/C2, SOHO: LASCO/C3, GOES: CCOR-1 | 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 195 imagery starting at 2026-09-25T10:25Z. Moving field lines are also visible beyond the east limb in SDO AIA 171 in ISWA. | |
| Coronal mass ejection — 2026-09-25 11:23 UTC | Coronal mass ejection | — | 745 km/s | 1 | — | STEREO A: SECCHI/COR2 | 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 faintly seen to the south in STEREO A EUV 195 imagery starting 2026-09-25T11Z as a faint dimming and faint post-eruptive arcades centered ~S40W80 or W90. Not really seen in GOES SUVI 304 or STEREO A 304 imagery. | |
| Coronal mass ejection — 2026-09-25 15:12 UTC | Coronal mass ejection | — | 524 km/s | 1 | — | SOHO: LASCO/C2, SOHO: LASCO/C3, GOES: CCOR-1 | 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 corresponding front even more faintly seen in STEREO A COR2 white light imagery to the NW but it is practically not seen in running difference imagery and seems much wider than the front seen in LASCO and CCOR-1. No source has been found in available EUV imagery for this event, so it is likely far sided. |
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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: 14 Oct 2026, 10:00 EDT.
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