Ειδοποιήσεις από το σύστημα έγκαιρης προειδοποίησης DONKI της NASA (διαστημικός καιρός, Ήλιος)
NASA DONKI Notifications
NASA DONKI Notifications
Message Type: CME
Message ID: 20251210-AL-001
Issue Time: 2025-12-10T00:45Z
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - CME (Lucy, Europa Clipper, BepiColombo, Juice)
##
## Message Issue Date: 2025-12-10T00:45:30Z
## Message ID: 20251210-AL-001
##
## Disclaimer: NOAA's Space Weather Prediction Center is the United States Government official source for space weather forecasts. This "Experimental Research Information" consists of preliminary NASA research products and should be interpreted and used accordingly.
## Summary:
C-type CME detected by GOES / STEREO A.
Start time of the event: 2025-12-09T18:45Z.
Estimated speed: ~803 km/s.
Estimated opening half-angle: 23 deg.
Direction (lon./lat.): 114/-21 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2025-12-09T18:45:00-CME-001
Based on preliminary analysis by the Moon to Mars Space Weather Analysis Office and heliospheric modeling carried out at NASA Community Coordinated Modeling Center, it is estimated that the CME may impact Lucy (glancing blow), Europa Clipper (glancing blow), BepiColombo, and Juice (glancing blow). The leading edge of the CME will reach BepiColombo at 2025-12-10T16:19Z, and the flank of the CME may reach Lucy at 2025-12-19T14:00Z, Europa Clipper at 2025-12-15T16:00Z, and Juice at 2025-12-12T19:00Z (plus minus 7 hours).
Links to the movies of the modeled event (includes CME: 2025-12-09T18:45:00-CME-001):
(a) 2 AU outer boundary
http://iswa.gsfc.nasa.gov/downloads/20251209_224700_2.0_anim.tim-den.gif
http://iswa.gsfc.nasa.gov/downloads/20251209_224700_2.0_anim.tim-vel.gif
http://iswa.gsfc.nasa.gov/downloads/20251209_224700_2.0_ENLIL_CONE_timeline.gif
http://iswa.gsfc.nasa.gov/downloads/20251209_224700_2.0_ENLIL_CONE_Bepi_timeline.gif
http://iswa.gsfc.nasa.gov/downloads/20251209_224700_2.0_ENLIL_CONE_Juice_timeline.gif
(b) 5.5 AU outer boundary
http://iswa.gsfc.nasa.gov/downloads/20251209_224700_5.5_anim.tim-den.gif
http://iswa.gsfc.nasa.gov/downloads/20251209_224700_5.5_anim.tim-vel.gif
http://iswa.gsfc.nasa.gov/downloads/20251209_224700_5.5_ENLIL_CONE_Lucy_timeline.gif
http://iswa.gsfc.nasa.gov/downloads/20251209_224700_5.5_ENLIL_CONE_EuropaClippr_timeline.gif
## Notes:
SCORE CME typification system:
S-type: CMEs with speeds less than 500 km/s
C-type: Common 500-999 km/s
O-type: Occasional 1000-1999 km/s
R-type: Rare 2000-2999 km/s
ER-type: Extremely Rare >3000 km/s
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - CMEs update (OSIRIS-APEX, Solar Orbiter, STEREO A)
##
## Message Issue Date: 2025-12-09T18:34:10Z
## Message ID: 20251209-AL-003
##
## Disclaimer: NOAA's Space Weather Prediction Center is the United States Government official source for space weather forecasts. This "Experimental Research Information" consists of preliminary NASA research products and should be interpreted and used accordingly.
## Summary:
Update on CME with ID 2025-12-08T22:36:00-CME-001 (see previous notification 20251209-AL-001), now simulated with the CME with ID 2025-12-09T00:12:00-CME-001. Based on preliminary analysis by the Moon to Mars Space Weather Analysis Office and heliospheric modeling carried out at NASA Community Coordinated Modeling Center, it is estimated that the CMEs may impact OSIRIS-APEX, Solar Orbiter, and STEREO A (glancing blow). The leading edge of the CME will reach OSIRIS-APEX at 2025-12-11T07:58Z and its flanks will reach Solar Orbiter at 2025-12-11T08:26Z and STEREO A at 2025-12-11T21:00Z (plus minus 7 hours).
CME parameters are:
1: Start time of the event: 2025-12-08T22:36Z.
Estimated speed: ~855 km/s.
Estimated opening half-angle: 17 deg.
Direction (lon./lat.): 30/18 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2025-12-08T22:36:00-CME-001
2: Start time of the event: 2025-12-09T00:12Z.
Estimated speed: ~748 km/s.
Estimated opening half-angle: 17 deg.
Direction (lon./lat.): 35/6 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2025-12-09T00:12:00-CME-001
Links to the movies of the modeled event (includes CMEs: 2025-12-08T22:36:00-CME-001, 2025-12-09T00:12:00-CME-001):
This CME event (2025-12-08T22:36:00-CME-001) is associated with M1.2 flare with ID 2025-12-08T22:04:00-FLR-001 which peaked at 2025-12-08T22:28Z.
This CME event (2025-12-09T00:12:00-CME-001) is possibly associated with M2.0 flare with ID 2025-12-09T00:37:00-FLR-001 which peaked at 2025-12-09T00:58Z.
SCORE CME typification system:
S-type: CMEs with speeds less than 500 km/s
C-type: Common 500-999 km/s
O-type: Occasional 1000-1999 km/s
R-type: Rare 2000-2999 km/s
ER-type: Extremely Rare >3000 km/s
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - Continued Radiation Belt Enhancement
##
## Message Issue Date: 2025-12-09T16:00:03Z
## Message ID: 20251209-AL-002
##
## Disclaimer: NOAA's Space Weather Prediction Center is the United States Government official source for space weather forecasts. This "Experimental Research Information" consists of preliminary NASA research products and should be interpreted and used accordingly.
## Summary:
Significantly elevated energetic electron fluxes in the Earth's outer radiation belt. GOES "greater than 2.0 MeV" integral electron flux remains elevated, recently crossing the threshold of 1000 pfu at 2025-12-09T14:35Z.
The elevated energetic electron flux levels observed since 2025-12-05T15:00Z (see notifications 20251205-AL-001, 20251207-AL-001) are caused by the arrival of a coronal hole high speed stream starting on 2025-12-03, reaching a maximum speed of approximately 730 km/s. The solar wind speed observed at L1 is currently around 370 km/s.
NASA spacecraft at GEO, MEO and other orbits passing through or in the vicinity of the Earth's outer radiation belt can be impacted.
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - CME (OSIRIS-APEX, Solar Orbiter, STEREO A)
##
## Message Issue Date: 2025-12-09T03:22:06Z
## Message ID: 20251209-AL-001
##
## Disclaimer: NOAA's Space Weather Prediction Center is the United States Government official source for space weather forecasts. This "Experimental Research Information" consists of preliminary NASA research products and should be interpreted and used accordingly.
## Summary:
C-type CME detected by GOES / SOHO.
Start time of the event: 2025-12-08T22:36Z.
Estimated speed: ~855 km/s.
Estimated opening half-angle: 17 deg.
Direction (lon./lat.): 30/18 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2025-12-08T22:36:00-CME-001
Based on preliminary analysis by the Moon to Mars Space Weather Analysis Office and heliospheric modeling carried out at NASA Community Coordinated Modeling Center, it is estimated that the CME may impact OSIRIS-APEX (glancing blow), Solar Orbiter (glancing blow), and STEREO A (glancing blow). The flank of the CME will reach OSIRIS-APEX at 2025-12-11T10:00Z, Solar Orbiter at 2025-12-11T10:00Z, and STEREO A at 2025-12-11T23:00Z (plus minus 7 hours).
Links to the movies of the modeled event (includes CME: 2025-12-08T22:36:00-CME-001):
This CME event (2025-12-08T22:36:00-CME-001) is associated with M1.2 flare from AR 14299 (N26W30) with ID 2025-12-08T22:04:00-FLR-001 which peaked at 2025-12-08T22:28Z.
SCORE CME typification system:
S-type: CMEs with speeds less than 500 km/s
C-type: Common 500-999 km/s
O-type: Occasional 1000-1999 km/s
R-type: Rare 2000-2999 km/s
ER-type: Extremely Rare >3000 km/s
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - CMEs update (Juno, OSIRIS-APEX, Solar Orbiter, STEREO A, Missions Near Earth)
##
## Message Issue Date: 2025-12-08T18:47:38Z
## Message ID: 20251208-AL-007
##
## Disclaimer: NOAA's Space Weather Prediction Center is the United States Government official source for space weather forecasts. This "Experimental Research Information" consists of preliminary NASA research products and should be interpreted and used accordingly.
## Summary:
Update on CMEs with IDs 2025-12-08T01:38:00-CME-001 and 2025-12-08T05:12:00-CME-001 (see previous notifications 20251208-AL-004 and 20251208-AL-006). Based on preliminary analysis by the Moon to Mars Space Weather Analysis Office and heliospheric modeling carried out at NASA Community Coordinated Modeling Center, it is estimated that the CMEs may impact Juno (glancing blow). The combined flank of the CMEs will reach Juno at 2025-12-24T06:00Z (plus minus 7 hours).
Previous simulations also estimate that the CMEs may affect OSIRIS-APEX, Solar Orbiter and STEREO A (glancing blow). The combined leading edge of the CMEs will reach OSIRIS-APEX at 2025-12-10T04:34Z and Solar Orbiter at 2025-12-10T07:48Z (plus minus 7 hours). The combined flank of the CMEs will reach STEREO A at 2025-12-10T18:00Z (plus minus 7 hours).
Previous simulation also indicates that the CMEs may impact NASA missions near Earth. Simulations indicate that the combined leading edge of the CMEs will reach NASA missions near Earth at about 2025-12-10T13:20Z (plus minus 7 hours). The roughly estimated expected range of the maximum Kp index is 5-7 (minor to strong).
CME parameters are (C-type):
1: Start time of the event: 2025-12-08T01:38Z.
Estimated speed: ~767 km/s.
Estimated opening half-angle: 34 deg.
Direction (lon./lat.): 11/11 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2025-12-08T01:38:00-CME-001
2: Start time of the event: 2025-12-08T05:12Z.
Estimated speed: ~664 km/s.
Estimated opening half-angle: 35 deg.
Direction (lon./lat.): 40/20 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2025-12-08T05:12:00-CME-001
Links to the movies of the modeled event (includes CMEs: 2025-12-08T01:38:00-CME-001, 2025-12-08T05:12:00-CME-001):
(b) 5.5 AU outer boundary
http://iswa.gsfc.nasa.gov/downloads/20251208_044200_5.5_anim.tim-den.gif
http://iswa.gsfc.nasa.gov/downloads/20251208_044200_5.5_anim.tim-vel.gif
http://iswa.gsfc.nasa.gov/downloads/20251208_044200_5.5_ENLIL_CONE_Juno_timeline.gif
## Notes:
This CME event (2025-12-08T01:38:00-CME-001) is associated with M2.4 flare with ID 2025-12-07T23:56:00-FLR-001 from Active Region 14299 (N25W13) which peaked at 2025-12-08T00:12Z.
This CME event (2025-12-08T05:12:00-CME-001) is associated with X1.1 flare with ID 2025-12-08T04:49:00-FLR-001 from Active Region 14298 (S12W53) which peaked at 2025-12-08T05:01Z (see notifications 20251208-AL-002, 20251208-AL-003).
SCORE CME typification system:
S-type: CMEs with speeds less than 500 km/s
C-type: Common 500-999 km/s
O-type: Occasional 1000-1999 km/s
R-type: Rare 2000-2999 km/s
ER-type: Extremely Rare >3000 km/s
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - CME (OSIRIS-APEX, Solar Orbiter, STEREO A, Missions Near Earth)
##
## Message Issue Date: 2025-12-08T18:37:04Z
## Message ID: 20251208-AL-006
##
## Disclaimer: NOAA's Space Weather Prediction Center is the United States Government official source for space weather forecasts. This "Experimental Research Information" consists of preliminary NASA research products and should be interpreted and used accordingly.
## Summary:
C-type CME detected by STEREO A / GOES / SOHO.
Start time of the event: 2025-12-08T05:12Z.
Estimated speed: ~664 km/s.
Estimated opening half-angle: 35 deg.
Direction (lon./lat.): 40/20 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2025-12-08T05:12:00-CME-001
Based on preliminary analysis by the Moon to Mars Space Weather Analysis Office and heliospheric modeling carried out at NASA Community Coordinated Modeling Center, it is estimated that this CME may affect OSIRIS-APEX, Solar Orbiter, and STEREO A. The leading edge of the CME will reach OSIRIS-APEX at 2025-12-10T16:40Z, Solar Orbiter at 2025-12-10T22:07Z, and STEREO A at 2025-12-10T22:02Z (plus minus 7 hours).
The simulation also indicates that the CME may have a glancing blow at NASA missions near Earth. Simulations indicate that the flank of the CME will reach NASA missions near Earth at about 2025-12-11T10:00Z (plus minus 7 hours). The roughly estimated expected range of the maximum Kp index is 4-5 (below minor to minor).
Links to the movies of the modeled event (includes CME: 2025-12-08T05:12:00-CME-001):
This CME event (2025-12-08T05:12:00-CME-001) is associated with X1.1 flare with ID 2025-12-08T04:49:00-FLR-001 which peaked at 2025-12-08T05:01Z (see notification(s) 20251208-AL-002, 20251208-AL-003).
SCORE CME typification system:
S-type: CMEs with speeds less than 500 km/s
C-type: Common 500-999 km/s
O-type: Occasional 1000-1999 km/s
R-type: Rare 2000-2999 km/s
ER-type: Extremely Rare >3000 km/s
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - CME update (ensemble) (STEREO A, Missions Near Earth)
##
## Message Issue Date: 2025-12-08T16:30:42Z
## Message ID: 20251208-AL-005
##
## Disclaimer: NOAA's Space Weather Prediction Center is the United States Government official source for space weather forecasts. This "Experimental Research Information" consists of preliminary NASA research products and should be interpreted and used accordingly.
## Summary:
BETA PRODUCT. ENSEMBLE PRODUCT IS STILL IN DEVELOPMENT MODE. PLEASE LET US KNOW IF YOU HAVE ANY SUGGESTIONS FOR MODIFICATIONS.
Ensemble modeling update on CME with ID 2025-12-06T21:12:00-CME-001 (see previous notification 20251206-AL-004). Based on analysis by the Moon to Mars Space Weather Analysis Office and heliospheric ensemble modeling carried out at the Community Coordinated Modeling Center, it is estimated that the CME may impact STEREO A. For 40 ensemble members (see notes section), simulations indicate that the leading edge of the CME will reach:
- STEREO A between about 2025-12-08T18:40Z and 2025-12-09T00:03Z (average arrival 2025-12-08T21:07Z) for 20% of simulations.
Additionally the CME is estimated to reach NASA missions near Earth between about 2025-12-08T18:07Z and 2025-12-09T16:29Z (average arrival 2025-12-09T01:08Z) for 100% of simulations. The ensemble-based forecast indicates that there is a 94% chance for the maximum Kp index to be in the 5-8 range (minor to severe).
Links to the ensemble details of the modeled event:
https://iswa.gsfc.nasa.gov/ENSEMBLE/2025-12-07_ncmes1_sims40_LAHAINA088/20251206_211200_ncmes1_sims40_LAHAINA088_anim_tim-den.gif
https://iswa.gsfc.nasa.gov/ENSEMBLE/2025-12-07_ncmes1_sims40_LAHAINA088/20251206_211200_ncmes1_sims40_LAHAINA088_arrival_Earth.gif
https://iswa.gsfc.nasa.gov/ENSEMBLE/2025-12-07_ncmes1_sims40_LAHAINA088/20251206_211200_ncmes1_sims40_LAHAINA088_Earth_stack.gif
https://iswa.gsfc.nasa.gov/ENSEMBLE/2025-12-07_ncmes1_sims40_LAHAINA088/20251206_211200_ncmes1_sims40_LAHAINA088_arrival_STA.gif
https://iswa.gsfc.nasa.gov/ENSEMBLE/2025-12-07_ncmes1_sims40_LAHAINA088/20251206_211200_ncmes1_sims40_LAHAINA088_STA_stack.gif
## Notes:
The CME event with ID 2025-12-06T21:12:00-CME-001 is also predicted to impact Solar Orbiter at 2025-12-08T20:08Z and OSIRIS-APEX at 2025-12-08T17:31Z (plus minus 7 hours) based on previous heliospheric modeling (see notification 20251206-AL-004).
The CME event with ID 2025-12-06T21:12:00-CME-001 is associated with an M8.1 flare from Active Region 14299 (N23E02) with ID 2025-12-06T20:29:00-FLR-001 which peaked at 2025-12-06T20:39Z (see notifications 20251206-AL-002 and 20251206-AL-003).
Ensemble CME modeling at M2M is performed by building sets of initial CME parameters and carrying out separate simulations for each set. This approach allows a mapping of initial CME parameter uncertainties into a statistical characterization of CME arrival times and impact at locations of interest.
Description of links: For each location, the first link shows the WSA-ENLIL+Cone model animation for the median CME input parameters, the second link shows the probabilistic distribution of predicted arrival times histogram, and the third link shows a stack plot of the WSA-ENLIL+Cone modeled magnetic field, velocity, density, and temperature for all ensemble members. For missions near Earth, a histogram of the probabilistic Kp forecast is also provided.
For the full details of the modeled event, please go here:
https://iswa.gsfc.nasa.gov/ENSEMBLE/2025-12-07_ncmes1_sims40_LAHAINA088/Detailed_results_20251206_211200_ncmes1_sims40_LAHAINA088.txt
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - CME (OSIRIS-APEX, Solar Orbiter, STEREO A, Missions Near Earth)
##
## Message Issue Date: 2025-12-08T14:42:17Z
## Message ID: 20251208-AL-004
##
## Disclaimer: NOAA's Space Weather Prediction Center is the United States Government official source for space weather forecasts. This "Experimental Research Information" consists of preliminary NASA research products and should be interpreted and used accordingly.
## Summary:
C-type CME detected by STEREO A.
Start time of the event: 2025-12-08T01:38Z.
Estimated speed: ~767 km/s.
Estimated opening half-angle: 34 deg.
Direction (lon./lat.): 11/11 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2025-12-08T01:38:00-CME-001
Based on preliminary analysis by the Moon to Mars Space Weather Analysis Office and heliospheric modeling carried out at NASA Community Coordinated Modeling Center, it is estimated that this CME may affect OSIRIS-APEX, Solar Orbiter, and STEREO A (glancing blow). The leading edge of the CME will reach OSIRIS-APEX at 2025-12-10T03:56Z and Solar Orbiter at 2025-12-10T07:36Z (plus minus 7 hours). The flank of the CME may reach STEREO A at 2025-12-10T18:00Z (plus minus 7 hours).
The simulation also indicates that the CME may impact NASA missions near Earth. Simulations indicate that the leading edge of the CME will reach NASA missions near Earth at about 2025-12-10T13:47Z (plus minus 7 hours). The roughly estimated expected range of the maximum Kp index is 5-7 (minor to strong).
Links to the movies of the modeled event (includes CME: 2025-12-08T01:38:00-CME-001):
This CME event (2025-12-08T01:38:00-CME-001) is associated with M2.4 flare with ID 2025-12-07T23:56:00-FLR-001 from Active Reggion 14299 (N25W13) which peaked at 2025-12-08T00:12Z.
SCORE CME typification system:
S-type: CMEs with speeds less than 500 km/s
C-type: Common 500-999 km/s
O-type: Occasional 1000-1999 km/s
R-type: Rare 2000-2999 km/s
ER-type: Extremely Rare >3000 km/s
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - X1.1 Flare
##
## Message Issue Date: 2025-12-08T11:46:06Z
## Message ID: 20251208-AL-003
##
## Disclaimer: NOAA's Space Weather Prediction Center is the United States Government official source for space weather forecasts. This "Experimental Research Information" consists of preliminary NASA research products and should be interpreted and used accordingly.
## Summary:
Significant flare detected by GOES.
Flare start time: 2025-12-08T04:49Z.
Flare peak time: 2025-12-08T05:01Z.
Flare intensity: X1.1 class.
Source region: S12W53 (Active Region 14298) (based on GOES SUVI imagery).
Increased energetic proton fluxes possible. Updates on this event will be provided when available.
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Auto-generated Space Weather Notification - Flare intensity has crossed the threshold of M5.0
##
## Message Issue Date: 2025-12-08T05:05:42Z
## Message ID: 20251208-AL-002
##
## Disclaimer: NOAA's Space Weather Prediction Center is the United States Government official source for space weather forecasts. This "Experimental Research Information" consists of preliminary NASA research products and should be interpreted and used accordingly.
## Summary:
Significant flare detected by GOES. Flare intensity has crossed the threshold of M5.0.
Flare M5.0 crossing time: 2025-12-08T05:00Z.
Increased energetic proton fluxes possible. Updates on this event will be provided when available.
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - CME (BepiColombo)
##
## Message Issue Date: 2025-12-08T00:28:42Z
## Message ID: 20251208-AL-001
##
## Disclaimer: NOAA's Space Weather Prediction Center is the United States Government official source for space weather forecasts. This "Experimental Research Information" consists of preliminary NASA research products and should be interpreted and used accordingly.
## Summary:
C-type CME detected by SOHO.
Start time of the event: 2025-12-07T22:00Z.
Estimated speed: ~686 km/s.
Estimated opening half-angle: 14 deg.
Direction (lon./lat.): 88/32 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2025-12-07T22:00:00-CME-001
Based on preliminary analysis by the Moon to Mars Space Weather Analysis Office and heliospheric modeling carried out at NASA Community Coordinated Modeling Center, it is estimated that the CME may impact BepiColombo (glancing blow). The flank of the CME will reach BepiColombo at 2025-12-09T00:00Z (plus minus 7 hours).
Links to the movies of the modeled event (includes CME: 2025-12-07T22:00:00-CME-001):
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - Continued Radiation Belt Enhancement
##
## Message Issue Date: 2025-12-07T15:27:37Z
## Message ID: 20251207-AL-001
##
## Disclaimer: NOAA's Space Weather Prediction Center is the United States Government official source for space weather forecasts. This "Experimental Research Information" consists of preliminary NASA research products and should be interpreted and used accordingly.
## Summary:
Significantly elevated energetic electron fluxes in the Earth's outer radiation belt. GOES "greater than 2.0 MeV" integral electron flux remains elevated, recently crossing the threshold of 1000 pfu at 2025-12-07T14:00Z.
The elevated energetic electron flux levels observed since 2025-12-05T15:00Z (see notification 20251205-AL-001) are likely caused by the arrival of a coronal hole high speed stream starting on 2025-12-03, reaching a maximum speed of approximately 730 km/s. The solar wind speed observed at L1 is currently around 457 km/s.
NASA spacecraft at GEO, MEO and other orbits passing through or in the vicinity of the Earth's outer radiation belt can be impacted.
