CCMC CME Scoreboard
CCMC CME Scoreboard
The CME Scoreboard is part of the the CME Arrival Time and Impact Working Team within the COSPAR International Space Weather Action Teams (ISWAT).Developed by the Community Coordinated Modeling Center (CCMC), the CME Scoreboard serves as a research-based pre-event forecasting validation platform.
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- See Latest News
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- Concerning the determination of CME arrival time (primarily provided by the M2M-SWAO)
- Join the mailing list
Active CMEs:
| CME: 2026-04-02T20:46:00-CME-001 | |||||||||||||||||||||||||||||||||||
| CME Note: Second of a two-part CME associated with an M3.5-class solar flare in Active Region 14404 (N12W18) and subsequent filament eruption taking place between 2026-04-02T16:00Z and 21:00Z, the CME is narrow and seen to the northwest in SOHO LASCO C2, more northerly as compared with the earlier 2026-04-02T18:48Z CME but closely following behind it, and not yet seen in STEREO A COR2A due to a data gap. There is a filament eruption clearly seen after 19:30Z best seen in GOES SUVI 304 which is the likely source and suggests the eruption may have been deflected slightly to the north. | |||||||||||||||||||||||||||||||||||
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Past CMEs:
| CME: 2026-04-01T23:45:00-CME-001 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Actual Shock Arrival Time: 2026-04-03T15:02Z | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: Max Kp: 6.67 CME Note: Large partial halo CME seen in GOES CCOR-1 with brighter bulk mostly directed to the northwest with wider, fainter shock extending from the north to the southwest starting around 2026-04-01T23:45Z in association with a large-scale, strong filament eruption occurring near N28W25 around 2026-04-01T23:00Z with an associated long-duration C-class flare; the eruption is characterized by destabilizing filament channel starting as early as 22:30Z in SDO AIA 193 followed by a lift off of the filament channel best seen in SDO AIA 304 and GOES SUVI 304 with bright post eruptive arcades and a broad, large dimming siganture seen best in SDO AIA 193. The core prominence structure and the widely opening field lines are also seen very well in GOES SUVI 284. |
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| CME: 2026-04-01T03:00:00-CME-001 | |||||||||||||||||||||||||||||||||||
| This CME was not detected at Earth! | |||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: Faint CME observed to the NW in SOHO LASCO C2, possibly too faint or not yet seen in other available coronagraph imagery and/or blocked by the GOES CCOR-1 Earth eclipse. The source is an eruption from AR 14403 starting around 2026-04-01T02:03Z in SDO AIA 171/193/304 as brightening centered around N20W11, field line movement, and filament ejecta extending narrowly up to the NE from the eruption, appearing to largely dissipate or reabsorb to the disk. Also seen in STEREO A EUVI 195/304 as the same brightening, field line movement, and filament ejecta. |
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| CME: 2026-04-01T00:24:00-CME-001 | |||||||||||||||||||||||||||||||||||
| This CME was not detected at Earth! | |||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: Faint CME to the NW observed only in SOHO LASCO C2, as the front dissipates after a few frames. The source is likely AR 14403, with some weak field line movement in SDO AIA 171/193 observed starting around 2026-03-31T23:16Z. Although this source and faint front are not significant or easy to match alone, it matches the signature of prior CME 2026-03-31T11:24Z also from AR 14403, corroborating this source. Likely overtaken/overshadowed by CME: 2026-04-01T23:45Z and may have arrived near 2026-04-02T15:02Z, though the arrival signature was more clearly associated with CME: 2026-04-01T23:45Z. |
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| CME: 2026-03-31T01:48:00-CME-001 | |||||||||||||||||||||||||||||||||||
| This CME was not detected at Earth! | |||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: This faint CME is visible to the NW in SOHO LASCO C2 following a lower C-class flare with associated filament eruption and moving/opening field lines starting around 2026-03-31T01:00Z as seen in GOES SUVI 304 and 284. This CME is not visible in GOES CCOR-1 due to an Earth-shine event, in STEREO A COR2 imagery due to a data gap from 2026-03-30T18:23Z to 2026-03-31T03:23Z, and in SOHO LASCO C3 due to faintness of event. There is likely deflection of this event due to a coronal hole located due south of the erupting region. |
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| CME: 2026-03-30T03:24:00-CME-001 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Actual Shock Arrival Time: 2026-04-01T11:29Z | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: Large partial-halo CME visible to the SE in SOHO LASCO C2/C3, GOES CCOR-1, and STEREO A COR2 imagery. The source is an X1.4 flare from Active Region 14405 (S27E45) peaking at 2026-03-30T03:19Z. The source is associated with brightening, dimming, moving/opening field lines, and EUV wave as seen in GOES SUVI 195, 304, 284, 131, 094, and 171 starting around 2026-03-30T02:56Z. |
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| CME: 2026-03-25T15:48:00-CME-001 | |||||||||||||||||||||||||||||||||||
| This CME was not detected at Earth! | |||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: Wide, faint, slow to evolve CME observed to the N/NW in SOHO LASCO C2/C3 and GOES CCOR-1, and less wide to the NE in STEREO A COR2. The CME begins very slow and faint, speeding up somewhat as it evolves. The source for this CME is not too clear, but may be associated with a very slow dimming region of the disk centered around N15W05 at 2026-03-25T15:00Z as part of a nearby coronal hole, slowly evolving and drifting with the coronal hole for almost a full 24 hours. This does match the slow, wide nature of this CME front, corroborating it as the potential source along with the swpc_cat triangulation to this general area of the disk. |
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| CME: 2026-03-25T00:45:00-CME-001 | |||||||||||||||||||||||||||||||||||
| This CME was not detected at Earth! | |||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: CME visible to the southwest in GOES CCOR-1 and in limited available SOHO LASCO C3 imagery in real-time during a data downlink period. Not visible in STEREO A COR2 imagery due to a data gap starting at 2026-03-24T13:53Z. The source is a C2.9 flare and associated eruption from AR 14400 (approximately S14W52) starting at 2026-03-24T23:52Z as seen in GOES SUVI 195/284 with rapidly opening field lines and possible EUV wave. |
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| CME: 2026-03-22T23:24:00-CME-001 | |||||||||||||||||||||||||||||||||||
| This CME was not detected at Earth! | |||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: CME observed to the W in SOHO LASCO C2/C3 and GOES CCOR-1, also W in STEREO A COR2 after a data gap ends at 2026-03-23T03:38Z. The source is a wide eruption from AR 14392 (S17W65), associated with a C1.5 flare peaking at 2026-03-22T23:09Z as observed in GOES SUVI 131. A small filament eruption near AR 14392 begins at 2026-03-22T22:50Z in GOES SUVI 304, setting off a wider rising and breaking of field lines over AR 14392 and likely extending around the west limb, starting around 2026-03-22T23:34Z in GOES SUVI 171/195/284. This is followed by a post-eruptive arcade over AR 14392 observed in GOES SUVI 171/195/284/304. |
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| CME: 2026-03-22T16:23:00-CME-001 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Actual Shock Arrival Time: 2026-03-25T05:53Z | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: This somewhat asymmetric bright CME is visible to the SE in STEREO A COR2 for a few frames before a usual overnight data gap and in SOHO LASCO C2/C3 and GOES CCOR-1. Its source is a significant filament eruption with associated brightening/dimming starting around 2026-03-22T15:30Z, followed by high rising post-eruptive arcades, as seen in GOES SUVI 304, 284, and 195 centered around S20E15, south of Active Region 14398, and seen as ejecta and opening of field lines seen in STEREO A EUV 195/403 on/close to the SE limb. It appears that there may be some SE deflection/directionality to it,. as it erupts and progresses outward in the GOES SUVI 284 field of view. There is a bright bulk front and a wider faint shock front seen in all three coronagraphs. | Arrival information: Increase in B_total from 3.88 nT to 7.21 nT increasing to a maximum of 10.19 nT. Solar wind speed increased from roughly 530 km/s to roughly 600 km/s. Minor increase in solar wind temperature and density were also observed. This signature is likely associated with the arrival of CME with ID 2026-03-22T16:23:00-CME-001 which was modeled to impact missions near Earth at 2026-03-25T08:55Z (+/- 7 hours). |
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| CME: 2026-03-21T21:36:00-CME-001 | |||||||||||||||||||||||||||||||||||
| This CME was not detected at Earth! | |||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: Semi-faint CME visible to the S/SE in SOHO LASCO C2/C3, GOES CCOR-1 and to the SE in STEREO A COR2 imagery. The source of this CME appears to be a slow moving/opening of field lines and dimming/brightening in the SE quadrant of the Earth-facing disk starting around 2026-03-21T18:30Z as seen in GOES SUVI 195, 304, and 284 centered around S45E30. There is a second eruption visible near S60W50 which may contribute to overlapping features in the outflowing part at the back of the CME starting around 2026-03-22T00:30Z as seen in GOES SUVI 304 and 195. |
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| CME: 2026-03-18T09:23:00-CME-001 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Actual Shock Arrival Time: 2026-03-20T20:17Z | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: Partial halo CME first seen to the SE by STEREO A COR2 at 2026-03-18T09:23Z, as well as to the West in SOHO LASCO C2/C3 and GOES CCOR-1 in later frames. The source of this event is an M2.7 flare from Active Region 4392 (S16W05) which peaked at 2026-03-18T08:42Z. This flare could be seen in GOES SUVI 131, along with dimming and field line opening seen in GOES SUVI 195, 284 and STEREO A EUVI 195. The dimming feature appears to propagate towards the Northwest, suggesting possible deflection. | Arrival information: Sharp increase in B_total from already elevated ~20 nT (following the IPS at L1 as detected by ACE and DSCOVR at 2026-03-20T01:31Z) to ~36 nT. This arrival signature also includes sudden increase in solar wind speed from 450 to 550 km/s, in ion temperature from 20k to over 800k and in ion density from the already elevated 19 particles/cc to over 55 particles/cc. The shock seems to be followed by a flux rope starting at ~2026-03-21T02:18Z, with smoother rotation of magnetic field components and a drop in ion temperature and density. This arrival signature is associated with the arrival of CME 2026-03-18T09:23Z, simulated with an expected arrival at Missions Near Earth at 2026-03-20T17:24Z (+- 7 hours). Starting around 2026-03-21T11:45Z, there is an observed slow and smooth rise in B_total up to a peak of ~38.97nT at 2026-03-21T15:32Z with rotation in the magnetic field components, B_z largely northward. A further drop here in density alongside minimal change in solar wind speed and temperature indicate a likely merged second structure within this arrival, of which no current CME candidate exists following further analysis. A reverse shock is observed at 2026-03-21T19:10Z returning B_total to elevated background levels, prior to the separate start of coronal hole high speed stream with ID 2026-03-21T19:13:00-HSS-001. |
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| CME: 2026-03-17T10:53:00-CME-001 | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| Actual Shock Arrival Time: 2026-03-20T01:31Z | |||||||||||||||||||||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: Narrow CME visible to the southeast in STEREO A COR2. The CME is not visible in GOES CCOR-1 or SOHO LASCO C2/C3 imagery. The source may be an M1.3 flare starting at 2026-03-17T08:55Z seen in GOES-Secondary SUVI 131 imagery. Dimming and moving field lines can be seen in GOES SUVI 195 around S14E10 and in STEREO A EUV 195 near the southeast limb. | Arrival information: Arrival signature primarily characterized by a series of sharp jumps in B_total with the first beginning at 2026-03-20T01:31Z and by an associated increase in solar wind speed. The first jump in B_total is from ~5 nT to ~8 nT with B_total subsequently reaching ~18.5 nT by 2026-03-20T10:09Z. Solar wind speed increases from ~330 km/s to ~450 km/s. The shock signature is also accompanied by an increase in temperature and an increase in density. There is a likely flux rope signature seen starting ~2026-03-20T13:22Z, with smooth rotation of magnetic field components. That flux rope signature is interrupted by a sudden B_total jump indicating the start of the next, separate Interplanetary Shock at 2026-03-20T20:17Z. This arrival signature is likely the combined arrival of four CMEs simulated together expected to give Missions Near Earth a glancing blow at 2026-03-20T06:00Z (+- 7 hours), including CME 2026-03-17T05:08Z, CME 2026-03-17T06:38Z, CME 2026-03-17T08:23Z, and CME 2026-03-17T10:53Z. |
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| CME: 2026-03-17T08:23:00-CME-001 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Actual Shock Arrival Time: 2026-03-20T01:31Z | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: CME visible to the SE in STEREO A COR2. The CME may also faintly be seen to the west in early frames of SOHO LASCO C2 imagery. It is not clearly visible in GOES CCOR-1 or STEREO A COR2 imagery. The potential source is a filament eruption with liftoff seen starting around 2026-03-17T05:15Z in the southeast of STEREO A EUV 304. The filament liftoff is also visible in GOES SUVI 304 imagery, centered around S05W15. | Arrival information: Arrival signature primarily characterized by a series of sharp jumps in B_total with the first beginning at 2026-03-20T01:31Z and by an associated increase in solar wind speed. The first jump in B_total is from ~5 nT to ~8 nT with B_total subsequently reaching ~18.5 nT by 2026-03-20T10:09Z. Solar wind speed increases from ~330 km/s to ~450 km/s. The shock signature is also accompanied by an increase in temperature and an increase in density. There is a likely flux rope signature seen starting ~2026-03-20T13:22Z, with smooth rotation of magnetic field components. That flux rope signature is interrupted by a sudden B_total jump indicating the start of the next, separate Interplanetary Shock at 2026-03-20T20:17Z. This arrival signature is likely the combined arrival of four CMEs simulated together expected to give Missions Near Earth a glancing blow at 2026-03-20T06:00Z (+- 7 hours), including CME 2026-03-17T05:08Z, CME 2026-03-17T06:38Z, CME 2026-03-17T08:23Z, and CME 2026-03-17T10:53Z. |
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| CME: 2026-03-17T06:38:00-CME-001 | |||||||||||||||||||||||||||||||||||
| Actual Shock Arrival Time: 2026-03-20T01:31Z | |||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: Narrow CME seen to the east in STEREO A COR2. Not visible in SOHO LASCO C2/C3 or GOES CCOR-1 imagery. The potential source is an eruption with dimming and opening field lines starting around 2026-03-17T03:55Z as seen on the SE limb in STEREO A EUV 195 imagery. This is similar to the source eruption associated with CME: 2026-03-17T05:08Z, which overlaps in the field of view of the coronagraph, but there may be two eruptions associated with this event. The eruption can also be seen as dimming in GOES-Secondary SUVI 195 imagery, centered around S20E05. | Arrival information: Arrival signature primarily characterized by a series of sharp jumps in B_total with the first beginning at 2026-03-20T01:31Z and by an associated increase in solar wind speed. The first jump in B_total is from ~5 nT to ~8 nT with B_total subsequently reaching ~18.5 nT by 2026-03-20T10:09Z. Solar wind speed increases from ~330 km/s to ~450 km/s. The shock signature is also accompanied by an increase in temperature and an increase in density. There is a likely flux rope signature seen starting ~2026-03-20T13:22Z, with smooth rotation of magnetic field components. That flux rope signature is interrupted by a sudden B_total jump indicating the start of the next, separate Interplanetary Shock at 2026-03-20T20:17Z. This arrival signature is likely the combined arrival of four CMEs simulated together expected to give Missions Near Earth a glancing blow at 2026-03-20T06:00Z (+- 7 hours), including CME 2026-03-17T05:08Z, CME 2026-03-17T06:38Z, CME 2026-03-17T08:23Z, and CME 2026-03-17T10:53Z. |
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| CME: 2026-03-17T05:08:00-CME-001 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Actual Shock Arrival Time: 2026-03-20T01:31Z | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: CME faintly seen to the SE in STEREO A COR2 and SOHO LASCO C2. The CME is not clearly visible in GOES CCOR-1 and is obscured by the pylon in SOHO LASCO C3. The potential source is a filament eruption with brightening starting at 2026-03-17T02:41Z from AR 14392 (approximately S15E10). The eruption is also visible near the SE limb from the point of view of STEREO A EUV 304 starting at 2026-03-17T03:45Z. | Arrival information: Arrival signature primarily characterized by a series of sharp jumps in B_total with the first beginning at 2026-03-20T01:31Z and by an associated increase in solar wind speed. The first jump in B_total is from ~5 nT to ~8 nT with B_total subsequently reaching ~18.5 nT by 2026-03-20T10:09Z. Solar wind speed increases from ~330 km/s to ~450 km/s. The shock signature is also accompanied by an increase in temperature and an increase in density. There is a likely flux rope signature seen starting ~2026-03-20T13:22Z, with smooth rotation of magnetic field components. That flux rope signature is interrupted by a sudden B_total jump indicating the start of the next, separate Interplanetary Shock at 2026-03-20T20:17Z. This arrival signature is likely the combined arrival of four CMEs simulated together expected to give Missions Near Earth a glancing blow at 2026-03-20T06:00Z (+- 7 hours), including CME 2026-03-17T05:08Z, CME 2026-03-17T06:38Z, CME 2026-03-17T08:23Z, and CME 2026-03-17T10:53Z. |
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| CME: 2026-03-16T13:26:00-CME-001 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| This CME was not detected at Earth! | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: This CME is visible as a partial halo directed to the northeast in SOHO LASCO C2/C3 and GOES CCOR-1 imagery. This event is not seen in STEREO A COR2 imagery in real-time due to a data gap starting at 2026-03-14T12:09Z. The source is an M2.7 flare and eruption from Active Region 14392 (S15E19) starting around 2026-03-13T12:00Z as seen in GOES SUVI 131/171/195/284/304 imagery. A corresponding EUV wave is observed moving primarily northwest of the eruption site in GOES SUVI 195/304 imagery, with post-eruptive arcades visible starting around 2026-03-16T13:00Z. | Arrival information: Analysis of the complex arrival signature over 3/19 thorugh 3/22 indicates that we likely did not observe this CME separately from the other arrival signatures, and considering it a miss. |
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| CME: 2026-03-06T04:09:00-CME-001 | ||||||||||||||||||||||||||||||||||||||||||||
| This CME was not detected at Earth! | ||||||||||||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: CME observed to the SE in SOHO LASCO C2/C3, GOES CCOR-1, and STEREO A COR2. A GOES CCOR-1 eclipse briefly obscures early frames of the CME, and the LASCO C3 pylon obscures analysis in running difference imagery. The source is a small filament eruption centered around S25E30 starting around 2026-03-06T02:32Z in GOES SUVI 304, also observed as some brightening and field line movement in GOES SUVI 171/195/284/304 and some dimming in GOES SUVI 171/195. |
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| CME: 2026-02-25T07:38:00-CME-002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| This CME was not detected at Earth! | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: Faint CME seen only in STEREO A COR2 coronagraph to the E. It is covered by a data gap in SOHO LASCO imagery and is not seen in GOES CCOR-1 imagery. Its source is likely the C2.6 flare peaking at 2026-02-25T06:56Z (S08W27), with an associated minor-size eruption seen in SDO AIA 193/304 as brightening/dimming and post-eruptive arcades. There is also a type II radio emission associated with this event. |
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| CME: 2026-02-16T14:08:00-CME-001 | |||||||||||||||||||||||||||||||||||
| Actual Shock Arrival Time: 2026-02-20T22:35Z | |||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: CME first seen to the E in STEREO A COR2 starting at 2026-02-16T14:08Z. This CME is also visible as a very faint partial halo in SOHO LASCO C2 following earlier, faster CME: 2026-02-16T13:23Z. The source of this CME is possibly related to the same eruption that resulted in CME: 2026-02-16T13:23Z. The main eruption is best seen in SDO AIA 171 and SDO AIA 304 starting around 2026-02-16T12:18Z spanning S30E15 to S10W05. There are a couple of smaller portions of the eruption that could be responsible for this CME. The first is an area of dimming that is deflected slightly to the north best seen in SDO AIA 193. The second is an area of dimming south of AR 14373 that follows the main eruption. It is also best seen in SDO AIA 193. In real time, the original analysis of this CME was complicated by gaps in the SOHO and STEREO A downlink schedules. ARRIVAL: A possible glancing blow from this CME could be indicated in the solar wind at L1 by a weak/unclear ICME arrival signature characterized by an enhancement in magnetic field ~2026-02-20T22:35Z, with an increase of Btotal from 7nT to 15nT, and increases in solar wind speed (from approximately 460 km/s 520 km/s), followed by a drop in temperature and density. This arrival signature is soon followed by an interplanetary shock seen at 2026-02-21T14:26Z which is likely associated with a coronal hole high speed stream. |
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| CME: 2026-02-16T13:23:00-CME-001 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| This CME was not detected at Earth! | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: CME first seen to the E in STEREO A COR2 starting at 2026-02-16T13:23Z. This CME is also seen as a faint, partial halo in SOHO LASCO C2/C3 and GOES CCOR-1. The source is most likely a large eruption best seen in SDO AIA 171 and SDO AIA 304 starting around 2026-02-16T12:18Z spanning S30E15 to S10W05. Subsequent dimming and an EUV wave can also be seen in SDO AIA 193. There is no clear arrival signature in solar wind on 2026-02-18 and 19. (Please note that there is a very weak/unclear CME arrival signature on 2026-02-20 (starting around 2026-02-20T22:35Z), with no accompanying increase in the solar wind speed, which is possibly a glancing blow from the the slower CME: 2026-02-16T14:08Z). |
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| CME: 2026-02-16T04:24:00-CME-001 | ||||||||||||||||||||||||||||||||||||||||||||
| This CME was not detected at Earth! | ||||||||||||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: Large CME first seen to the E in SOHO LASCO C2 starting at 2026-02-16T04:24Z. This CME is also seen to the E in SOHO LASCO C3 and as a partial halo in STEREO A COR2 with the bulk to the E. The CME is also seen to the E in GOES CCOR-1, but the majority of its propagation is obscured by Earth-shine. There appears to be some northward deflection very early in the propagation of the CME in the SOHO LASCO C2 FOV. The source of this CME is associated with an occulted M2.4 flare from beyond the E limb (~S10) that peaked at 2026-02-16T04:35Z. The associated eruption and ejecta can be seen across SDO AIA wavelengths, but the flare is best seen in SDO AIA 131. No clear arrival signature seen in the solar wind. |
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| CME: 2026-02-13T09:38:00-CME-001 | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| This CME was not detected at Earth! | |||||||||||||||||||||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: CME visible to the NW in GOES CCOR-1 and the NE in STEREO A COR2. The CME is not visible in SOHO LASCO C2/C3 in real time due to a downlink gap. The source is an M1.0 flare starting at 2026-02-13T08:28Z from AR 14373 (N10W15) as best seen in SDO AIA 131. Dimming and post eruptive arcades are also best seen in SDO AIA 193. The eruption is also visible in the NE quadrant of the disk from the point of view of STEREO A EUV imagery. No arrival signature is seen in the solar wind at L1. |
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| CME: 2026-02-05T15:48:00-CME-001 | ||||||||||||||||||||||||||||||||||||||||||||
| This CME was not detected at Earth! | ||||||||||||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: CME observed to the S/SW in SOHO LASCO C2/C3, greatly obscured by the pylon in GOES CCOR-1, and to the SE of STEREO A COR2 for 3 frames before a data gap begins at 2026-02-05T16:08Z. The source is likely associated with an M1.8 flare from AR 14362 (S18W17) which peaked at 2026-02-05T15:13Z, observed in SDO AIA 131. Following this flare, a large but faint southerly deflected EUV wave is observed causing a wide swath of dimming and field line wiggling to the south of this region observed in SDO AIA 171/193 and GOES SUVI 284, centered around S45W10 and spanning approximately E25-W30 and S30-S65. Multiple concentric fronts emerge in LASCO C2 following the intial 2026-02-05T15:48Z front, but these are considered part of the same complex bulk. |
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| CME: 2026-02-05T14:12:00-CME-001 | |||||||||||||||||||||||||||||||||||
| This CME was not detected at Earth! | |||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: This CME is faint but visible to the south in SOHO LASCO C2 and to the southeast in STEREO A COR2 imagery for a few frames before becoming too diffuse to observe. The source may be related to a dimming region entered near S33E10 starting around 2026-02-05T13:00Z in SDO AIA 193 imagery. |
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| CME: 2026-02-03T19:00:00-CME-001 | ||||||||||||||||||||||||||||||||||||||||||||
| This CME was not detected at Earth! | ||||||||||||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: This CME is visible to the west/northwest in SOHO LASCO C2/C3 and GOES CCOR-1 imagery. This event is visible to the northwest in STEREO A COR2 imagery following a data gap that ends at 2026-02-04T03:23Z. The source may be related to a slow-to-lift off filament eruption starting around 2026-02-03T15:00Z which spans ~N20W30 to ~N00W45 as seen in SDO AIA 193/304 imagery. A subsequent dimming is observed in SDO AIA 193 imagery around this time which appears to move westward. |
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| CME: 2026-02-02T03:12:00-CME-001 | ||||||||||||||||||||||||||||||||||||||||||||
| This CME was not detected at Earth! | ||||||||||||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: CME/outflow seen to the NE in SOHO LASCO C2/C3, GOES CCOR-1 and (most clearly) in STEREO A COR2 following and overlapping with CME: 2026-02-02T00:48Z. (Its start in LASCO might be somewhat different). This is the most distinct outflow front among the multiple follow ups to CME: 2026-02-02T00:48Z. It is especially distinct in STEREO A COR2, as it seems to have a higher latitude than the CME: 2026-02-02T00:48Z. Its source is not clear but could be the long-duration M5.2 flare from AR 4366 (N13E35) peaking at 2026-02-02T02:51Z. No clear arrival signature for this CME has been seen in the solar wind. |
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| CME: 2026-02-02T00:48:00-CME-001 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Actual Shock Arrival Time: 2026-02-04T14:20Z | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: Complex CME consisting of multiple overlapping fronts the first of which is first seen to the NE by SOHO LASCO C2 beginning at 2026-02-02T00:48Z, as well as by GOES CCOR-1 in later frames. The start of this event is covered in STEREO A COR2 by a data gap which began at 2026-02-01T14:53Z and ended at 2026-02-02T03:23Z but after the data gap at least one lobe of this CME is seen to the ENE in STEREO A COR2 in multiple timestamps. The source of this event is an X8.1 flare from Active Region 14366 (N13E35) that peaked at 2026-02-01T23:57Z and possibly also the following X2.8 flare from the same AR peaking at 2026-02-02T00:36Z. The flares are visible in SDO AIA and GOES SUVI 131. Two bouts of filament ejecta are also seen in SDO AIA and GOES SUVI 304 in association with these flares, the earlier ejecta more northwardly directed and seemingly deflecting towards the west, and the ejecta after the second flare which is not as northward as the initial one. Arrival at L1: Characterized by an amplification of magnetic field components with Btotal increasing from 10nT at 2026-02-04T14:20Z to 22nT at 2026-02-04T14:24Z. Solar wind speeds increase from ~300 km/s at 2026-02-04T14:20Z to 400 km/s at 2026-02-04T14:25Z. A subsequent increase in temperature is observed from 36,000 K to 212,000 K, with an increase in density also observed around this time from 1 p/cc to 13 p/cc. |
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| CME: 2026-01-18T18:09:00-CME-001 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Actual Shock Arrival Time: 2026-01-19T18:55Z | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: Max Kp: 8.67 CME Note: Halo CME first seen to the East by STEREO A COR2 beginning at 2026-01-18T18:09Z, as well as by GOES CCOR-1 as a halo in later frames. This CME was initially covered by a routine scheduled downlink data gap in SOHO LASCO C2/C3 which began at 2026-01-18T18:00Z but LASCO data became fully available later. The source of this CME is a long duration X1.9 flare from Active Region 14341 (S15E20), which peaked at 2026-01-18T18:09Z, with some possible contribution from Active Region 14345 (S16E27). This flare is visible in SDO AIA 94 and 131 and the associated eruption is seen as a wide region of dimming and field line opening in SDO AIA 193, 211 and GOES SUVI 284, as well as very high and large area post eruptive arcades seen in SDO AIA 94, 304 and 193. Ejecta is seen in SDO AIA 193 and in STEREO A EUV 304 imagery (southwardly directed off the SE limb as seen from STEREO A). STEREO A 195 also sees it as a large opening of field lines close to the limb, around the equator. Arrival at L1: Characterized by a sharp amplification of magnetic field components with Btotal increasing from ~6nT at 2026-01-19T18:55Z to ~86nT at 2026-01-19T18:59Z. The solar wind data is likely contaminated due to a known issue with the ACE spacecraft during solar energetic particle events, however solar wind data returns around 2026-01-19T21:18Z measuring ~1000 km/s. Density increased from ~3 p/cc at 2026-01-19T18:55Z to 29 p/cc at 2026-01-19T19:02Z. Temperature observed an increase from ~65,000 K at 2026-01-19T21:15Z to ~900,000 K at 2026-01-19T21:23Z. A large southern coronal hole which crossed the central meridian on 2026-01-15 was located to the south and west of the eruptive source for CME: 2026-01-18T18:09Z (S15E20), and while no distinct coronal high speed stream signature was identified within this arrival signature the location and size of the coronal hole may likely have influenced this CME as it traveled to and arrived at L1. |
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| CME: 2026-01-10T20:48:00-CME-001 | ||||||||||||||||||||||||||||||||||||||||||||
| Actual Shock Arrival Time: 2026-01-13T13:43Z | ||||||||||||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: Faint CME observed to the S in SOHO LASCO C2/C3, obscured by the pylon in GOES CCOR-1 and unseen in STEREO A COR2 due to a data gap beginning at 2026-01-10T14:53Z. The source is a complex eruption associated with a C2.1 flare (S16W04) from AR 14339 peaking at 2026-01-10T19:42Z observed in SDO AIA 131, observed as what is likely two bulk fronts as CME: 2026-01-10T20:36Z and CME: 2026-01-10T20:48Z. Following the flare, filament ejecta is observed in SDO AIA 304 traveling S/SW but appearing to mostly fall back onto the disk likely associated with CME: 2026-01-10T20:36Z, and that is followed by dimming starting around 2026-01-10T19:57Z centered around S27W02 observed in SDO AIA 193 likely associated with this CME. Arrival signature: Characterized by a small, gradual enhancement in magnetic field components (B_t: approx. 2nT to 7nt , B_x: approx. 2nT to 5nT , B_y: approx. 1nT to -6nT , B_z: approx. -4nT to 1nT) as well as minor increases in temperature, density and velocity components. Following the minor enhancement, magnetic field components remained smooth and separated, and density slightly decreased, indicating the likely passage of a small flux rope. |
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| CME: 2026-01-10T20:36:00-CME-001 | |||||||||||||||||||||||||||||||||||
| Actual Shock Arrival Time: 2026-01-13T13:43Z | |||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: Thin jet-like CME observed to the S in SOHO LASCO C2/C3, obscured by the pylon in GOES CCOR-1 and unseen in STEREO A COR2 due to a data gap beginning at 2026-01-10T14:53Z. The source is a complex eruption associated with a C2.1 flare (S16W04) from AR 14339 peaking at 2026-01-10T19:42Z observed in SDO AIA 131, observed as what is likely two bulk fronts as CME: 2026-01-10T20:36Z and CME: 2026-01-10T20:48Z. Following the flare, filament ejecta is observed in SDO AIA 304 traveling S/SW but appearing to mostly fall back onto the disk likely associated with this CME, and that is followed by dimming starting around 2026-01-10T19:57Z centered around S27W02 observed in SDO AIA 193 likely associated with CME: 2026-01-10T20:48Z. Arrival signature: Characterized by a small, gradual enhancement in magnetic field components (B_t: approx. 2nT to 7nt , B_x: approx. 2nT to 5nT , B_y: approx. 1nT to -6nT , B_z: approx. -4nT to 1nT) as well as minor increases in temperature, density and velocity components. Following the minor enhancement, magnetic field components remained smooth and separated, and density slightly decreased, indicating the likely passage of a small flux rope. |
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| CME: 2026-01-08T21:48:00-CME-001 | |||||||||||||||||||||||||||||||||||
| This CME was not detected at Earth! | |||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: Very faint possible CME front visible only in difference imagery to the N/NW in SOHO LASCO C2. The source is believed to be a C3.4 class flare from AR 13443 (S14W04) with a very clear dimming structure and associated EUV wave heavily deflected to the N/NW as seen in SDO/AIA 193. This deflection may be due to coronal holes nearby. |
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| CME: 2026-01-08T17:00:00-CME-001 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Actual Shock Arrival Time: 2026-01-10T19:36Z | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: Bright partial halo CME to the S and SE in SOHO LASCO and GOES CCOR-1 coronagraphs, fully covered by the daily data gap in STEREO A COR2. Its source is a massive, very complex filament eruption S and E of Active Region 14334 (S19E03), potentially involving two erupting filaments (one directly south of this active region and another more to the east. This eruption starts after ~2026-01-08T16Z to the SE of disk center and is associated with the long-duration C5.6 flare in this active region peaking at 2026-01-08T17:30Z. It is seen in SDO AIA 304/193 as bright, extensive post-eruptive arcades, a large-area dimming, faint EUV wave and erupting filaments seen in 304. Arrival at L1 (analyzed in discussion with LASSOS team): Significant shock signature characterized by a sudden jump in B total from 5 to 19nT, with Bz quickly reaching -18nT and then staying negative for four hours. Accompanied by a sharp increase in the solar wind speed from 450 to 620 km/s. There is also a sudden increase in ion density from 5 to 20 p/cc and a simultaneous, more gradual, increase in ion temperature from 35 K to over 500 K. After 2026-01-10T23:30Z the signature changes to what is likely an arrival of the flux rope, with smooth rotation of components and Bz turning northward for over four hours. B total increases from 7 to over 15 nT and density drops. It is possible that the initial shock signature incorporates a glancing blow from another CME. |
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| CME: 2026-01-08T15:48:00-CME-001 | ||||||||||||||||||||||||||||||||||||||||||||
| Actual Shock Arrival Time: 2026-01-10T19:36Z | ||||||||||||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: [Tentatively closed as arrival] Faint CME seen (mostly in difference imagery) to the E in SOHO LASCO and GOES CCOR-1, covered by the data gap in STEREO A. Source: eruption N of AR 14336 (S10E33), seen as dark moving ejecta in SDO AIA 304 starting at 2026-01-08T14:48Z and centered initially ~(N03E30). There could be eastward deflection of this CME because of a small coronal hole just west of its source. Arrival at L1 (analyzed in discussion with LASSOS team): this CME was possibly swept by the front of the later, more prominent, CME:2026-01-08T17:00Z, which arrived on 2026-01-10T19:36Z, with a significant shock characterized by a sudden jump in B total from 5 to 19nT, with Bz quickly reaching -18nT, accompanied by a sharp increase in the solar wind speed from 450 to 620 km/s, a sudden increase in ion density from 5 to 20 p/cc and a simultaneous, more gradual, increase in ion temperature from 35 K to over 500 K. The shock is followed after 2026-01-10T23:30Z by a flux rope. It is possible that this complex arrival signature also incorporates a glancing blow from CME: 2026-01-08T15:48Z, although there is no clear indication of it. |
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| CME: 2026-01-08T05:53:00-CME-001 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Actual Shock Arrival Time: 2026-01-10T19:36Z | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: This CME is visible to the southeast in SOHO LASCO C2/C3, GOES CCOR-1, and STEREO A COR2 imagery. This event is more narrow as observed by STEREO A COR2 imagery, while a wider feature is observed in SOHO LASCO C2/C3 and GOES CCOR-1. The source is an eruption and C4.4 flare from Active Region 14334 (S18E05) starting around 2026-01-08T05:30Z as seen in SDO AIA 131/171/193/304, GOES SUVI 131/171/195/284/304 and STEREO A EUVI 195/304 imagery. Ejecta can be observed deflecting southeast of the eruption site, possibly due to a nearby coronal hole west of AR 14334. Arrival at L1 (analyzed in discussion with LASSOS team): this CME was likely swept by the front of the later, more prominent, CME: CME: 2026-01-08T17:00Z, which arrived on 2026-01-10T19:36Z, with a significant shock characterized by a sudden jump in B total from 5 to 19nT, with Bz quickly reaching -18nT, accompanied by a sharp increase in the solar wind speed from 450 to 620 km/s, a sudden increase in ion density from 5 to 20 p/cc and a simultaneous, more gradual, increase in ion temperature from 35 K to over 500 K. It is possible that this shock signature incorporates a glancing blow from CME: 2026-01-08T05:53Z. |
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| CME: 2026-01-07T06:08:00-CME-001 | ||||||||||||||||||||||||||||||||||||||||||||
| This CME was not detected at Earth! | ||||||||||||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: The arrival of this CME was not detected at L1. CME visible to the SE in STEREO A COR2 and the SSE in SOHO LASCO C2/C3 and GOES CCOR-1. The CME may be partially obscured by the pylon in GOES CCOR-1. The likely source is an eruption with dimming seen south of AR 14334, around S30E25, starting around 2026-01-07T03:52Z as best seen in SDO AIA 193. The eruption is also seen from the point of view of STEREO A 195, closer to the southeast limb. |
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| CME: 2026-01-07T04:23:00-CME-001 | |||||||||||||||||||||||||||||||||||
| This CME was not detected at Earth! | |||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: The arrival of this CME was not detected at L1. CME first seen to the ESE in STEREO A COR2 starting around 2026-01-07T04:23Z. The exact start time is somewhat unclear due to imagery quality. This CME is also seen in to the SE in SOHO LASCO C2/C3 and GOES CCOR-1. The leading edge of the CME is extremely faint and difficult to see in white light imagery. The source of this CME is likely associated with one of a series of eruptions from AR 14334. The eruption beginning around 2026-01-07T03:00Z associated with a C2.9 flare from AR 14334 (S15E18) that peaked at 2026-01-07T03:54Z is the most likely source candidate. The eruptive behavior, including some filamentary structure, and flare can be see across SDO wavelengths but are best seen in SDO AIA 131 and SDO AIA 304. There appears to be some deflection possibly due to the southern extension of coronal hole W of AR 14334 that was centered approximately around S18E05 at the time of the eruption. |
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| CME: 2026-01-06T02:00:00-CME-001 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Actual Shock Arrival Time: 2026-01-08T04:57Z | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: Max Kp: 3.67 CME Note: Wide CME first seen to the East in SOHO LASCO C2 beginning at 2026-01-06T02:00Z, as well as by SOHO LASCO C3 and GOES CCOR-1 in later frames. This CME is not seen in STEREO A COR2 due to a data gap from 2026-01-05T17:23Z to 2026-01-06T04:23Z. The source of this event is a C2.2 class flare and associated eruption from Active Region 14334 (S15E33) which began at approx. 2026-01-06T00:15Z. This flare is visible in SDO AIA 131, along with dimming seen in SDO AIA 193 and 211. Field line opening can be seen in SDO AIA 171 and GOES SUVI 284. Arrival characterized by an amplification of magnetic field components with Btotal increasing from 4nT at 2026-01-08T04:57Z to 14nT at 2026-01-08T16:24Z. A subsequent increase in solar wind speed is observed from ~375 km/s at 2026-01-08T04:57Z to ~430 at 17:12Z. Throughout this signature an increase in temperature is observed from ~25,000 K to ~60,000 K, with density increasing from ~4p/cc to ~18 p/cc. |
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| CME: 2026-01-01T19:36:00-CME-001 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Actual Shock Arrival Time: 2026-01-04T20:41Z | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Observed Geomagnetic Storm Parameters: ---- CME Note: CME first seen to the NNE by SOHO LASCO C2 beginning at 2026-01-01T19:36Z, as well as by SOHO LASCO C3 and GOES CCOR-1 in later frames. This CME is currently not visible in STEREO A COR2 imagery due to a data gap which began at 2026-01-01T04:38Z. The source of this event is a C6.2 flare from AR 14324 (N24E01) seen in SDO AIA 131 peaking at 2026-01-01T17:59Z. A wide region of dimming and field line opening is also visible in SDO AIA 171, 193, 211 and GOES SUVI 284, followed by post eruptive arcades seen in SDO AIA 131 and 193. | Arrival Information: Characterized by a sharp amplification of magnetic field components (B_t: approx. 5.7nT to 9.5nT , B_x: approx. -2.6nT to -1.8nT , B_y: -4.6nT to -6.6nT , B_z: -1.5nT to -6.2nT) along with increases in temperature (approx. 52kK to 182kK), density (approx. 0.23 p/cc to 2.36 p/cc) and speed (approx. 425km/s to 502km/s). This IPS signature is likely associated with the arrival of CME: 2026-01-01T19:36Z. |
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