Alerts from NASA's DONKI Early Warning System (Space Weather, Sun)
NASA DONKI Notifications
NASA DONKI Notifications
Message Type: CME
Message ID: 20260425-AL-001
Issue Time: 2026-04-25T01:18Z
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - CME (STEREO A, Juice, Parker Solar Probe)
##
## Message Issue Date: 2026-04-25T01:18:32Z
## Message ID: 20260425-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: 2026-04-24T19:30Z.
Estimated speed: ~575 km/s.
Estimated opening half-angle: 35 deg.
Direction (lon./lat.): 78/37 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-04-24T19:30:00-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 STEREO A (minor impact), Juice (glancing blow), and Parker Solar Probe (glancing blow). The flank of the CME will reach STEREO A at 2026-04-27T12:00Z, Juice at 2026-04-29T04:00Z, and Parker Solar Probe at 2026-04-26T12:00Z (plus minus 7 hours).
Links to the movies of the modeled event (includes CME: 2026-04-24T19:30:00-CME-001):
This CME event (2026-04-24T19:30:00-CME-001) is associated with M6.4 flare from Active Region 14419 (N15W78) with ID 2026-04-24T17:54:00-FLR-001 which peaked at 2026-04-24T18:15Z (see notifications 20260424-AL-008 and 20260424-AL-009).
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 (Juice, OSIRIS-APEX, Parker Solar Probe, STEREO A, Europa Clipper, BepiColombo, Missions Near Earth)
##
## Message Issue Date: 2026-04-24T18:43:51Z
## Message ID: 20260424-AL-010
##
## 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 2026-04-24T01:24:00-CME-001 and 2026-04-24T08:24:00-CME-001 (see previous notifications 20260424-AL-003 and 20260424-AL-006), now simulated with CMEs with IDs 2026-04-23T18:00:00-CME-001, 2026-04-23T14:24:00-CME-001 and 2026-04-23T16:30:00-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 combined front of these five CMEs may affect Juice, OSIRIS-APEX, Parker Solar Probe, STEREO A, Europa Clipper (minor impact), and BepiColombo (glancing blow). The combined leading edge of the CMEs will reach STEREO A at 2026-04-25T22:17Z and Juice at 2026-04-27T01:46Z and their flank will reach OSIRIS-APEX at 2026-04-27T11:26Z, Parker Solar Probe at 2026-04-25T16:29Z, Europa Clipper at 2026-04-29T04:00Z, and BepiColombo at 2026-04-25T02:00Z (plus minus 7 hours).
The simulation also indicates that the CME with ID 2026-04-24T01:24:00-CME-001 may have a cursory glancing blow at NASA missions near Earth. Simulations indicate that the flank of this CME may reach NASA missions near Earth at about 2026-04-27T02:00Z (plus minus 7 hours). The roughly estimated expected range of the maximum Kp index is 2-3 (below minor).
CME parameters are:
1: C-type CME (parameters updated)
Start time of the event: 2026-04-24T01:24Z.
Estimated speed: ~772 km/s.
Estimated opening half-angle: 38 deg.
Direction (lon./lat.): 37/30 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-04-24T01:24:00-CME-001
2: O-type CME (parameters not updated):
Start time of the event: 2026-04-24T08:24Z.
Estimated speed: ~1237 km/s.
Estimated opening half-angle: 45 deg.
Direction (lon./lat.): 63/36 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-04-24T08:24:00-CME-001
3: Start time of the event: 2026-04-23T18:00Z.
Estimated speed: ~637 km/s.
Estimated opening half-angle: 28 deg.
Direction (lon./lat.): 46/37 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-04-23T18:00:00-CME-001
4: Start time of the event: 2026-04-23T14:24Z.
Estimated speed: ~405 km/s.
Estimated opening half-angle: 26 deg.
Direction (lon./lat.): 43/43 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-04-23T14:24:00-CME-001
5: Start time of the event: 2026-04-23T16:30Z.
Estimated speed: ~406 km/s.
Estimated opening half-angle: 22 deg.
Direction (lon./lat.): 47/39 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-04-23T16:30:00-CME-001
Links to the movies of the modeled event (includes CMEs: 2026-04-23T18:00:00-CME-001, 2026-04-23T14:24:00-CME-001, 2026-04-23T16:30:00-CME-001, 2026-04-24T01:24:00-CME-001, 2026-04-24T08:24:00-CME-001):
This CME event (2026-04-23T18:00:00-CME-001) is associated with M4.9 flare from Active Region 14419 (N15W67) with ID 2026-04-23T17:02:00-FLR-001 which peaked at 2026-04-23T17:08Z.
This CME event (2026-04-23T14:24:00-CME-001) is associated with M1.7 flare from Active Region 14419 (N17W66) with ID 2026-04-23T13:42:00-FLR-001 which peaked at 2026-04-23T14:00Z.
This CME event (2026-04-24T01:24:00-CME-001) is associated with X2.4 flare from Active Region 14419 (N16W68) with ID 2026-04-24T00:51:00-FLR-001 which peaked at 2026-04-24T01:07Z (see notifications 20260424-AL-001, 20260424-AL-002).
This CME event (2026-04-24T08:24:00-CME-001) is associated with X2.5 flare from Active Region 14419 (N16W70) with ID 2026-04-24T08:01:00-FLR-001 which peaked at 2026-04-24T08:13Z (see notifications 20260424-AL-004, 20260424-AL-005).
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 - M6.4 Flare
##
## Message Issue Date: 2026-04-24T18:23:32Z
## Message ID: 20260424-AL-009
##
## 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: 2026-04-24T18:00Z.
Flare peak time: 2026-04-24T18:15Z.
Flare intensity: M6.4 class.
Source region: N15W78 (Active Region 14419) (based on SDO 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: 2026-04-24T18:13:04Z
## Message ID: 20260424-AL-008
##
## 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: 2026-04-24T18:10Z.
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 update (Lucy, Europa Clipper, OSIRIS-APEX, Missions Near Earth)
##
## Message Issue Date: 2026-04-24T16:08:24Z
## Message ID: 20260424-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 CME with ID 2026-04-23T05:12:00-CME-001 (see previous notification 20260423-AL-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 Europa Clipper (glancing blow), OSIRIS-APEX (glancing blow), and Lucy (glancing blow). The flank of the CME will reach Europa Clipper at 2026-04-29T06:00Z, OSIRIS-APEX at 2026-04-27T03:00Z, and Lucy at 2026-05-07T06:00Z (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 2026-04-26T00:45Z (plus minus 7 hours). The roughly estimated expected range of the maximum Kp index is 3-5 (below minor to minor).
CME parameters are (C-type):
Start time of the event: 2026-04-23T05:12Z.
Estimated speed: ~889 km/s.
Estimated opening half-angle: 38 deg.
Direction (lon./lat.): -40/16 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-04-23T05:12:00-CME-001
Links to the movies of the modeled event (includes CME: 2026-04-23T05:12:00-CME-001):
(a) 2 AU outer boundary
https://iswa.ccmc.gsfc.nasa.gov/api/redirect?filename=20260423_085900_2.0_anim.tim-den.gif
https://iswa.ccmc.gsfc.nasa.gov/api/redirect?filename=20260423_085900_2.0_anim.tim-vel.gif
https://iswa.ccmc.gsfc.nasa.gov/api/redirect?filename=20260423_085900_2.0_ENLIL_CONE_timeline.gif
https://iswa.ccmc.gsfc.nasa.gov/api/redirect?filename=20260423_085900_2.0_ENLIL_CONE_Osiris_timeline.gif
https://iswa.ccmc.gsfc.nasa.gov/api/redirect?filename=20260423_085900_2.0_ENLIL_CONE_EuropaClippr_timeline.gif
(b) 5.5 AU outer boundary
https://iswa.ccmc.gsfc.nasa.gov/api/redirect?filename=20260423_085900_5.5_anim.tim-den.gif
https://iswa.ccmc.gsfc.nasa.gov/api/redirect?filename=20260423_085900_5.5_anim.tim-vel.gif
https://iswa.gsfc.nasa.gov/api/redirect?filename=20260423_085900_5.5_ENLIL_CONE_Lucy_timeline.gif
## Notes:
This CME event (2026-04-23T05:12:00-CME-001) is associated with M1.2 flare from Active Region 14420 (N16E40) with ID 2026-04-23T04:41:00-FLR-001 which peaked at 2026-04-23T04:44Z and M1.2 flare from Active Region 14420 (N16E35) with ID 2026-04-23T04:50:00-FLR-001 which peaked at 2026-04-23T04:59Z.
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 (Juice, Parker Solar Probe, STEREO A, Europa Clipper, OSIRIS-APEX, BepiColombo)
##
## Message Issue Date: 2026-04-24T12:19:47Z
## Message ID: 20260424-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:
O-type CME detected by STEREO A / GOES / SOHO.
Start time of the event: 2026-04-24T08:24Z.
Estimated speed: ~1237 km/s.
Estimated opening half-angle: 45 deg.
Direction (lon./lat.): 63/36 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-04-24T08:24:00-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 Juice, Parker Solar Probe, STEREO A, Europa Clipper (minor impact), OSIRIS-APEX (minor impact), and BepiColombo (glancing blow). The leading edge of the CME will reach STEREO A at 2026-04-25T23:12Z and Juice at 2026-04-27T02:51Z, and its flank will reach Parker Solar Probe at 2026-04-25T16:26Z, Europa Clipper at 2026-04-29T18:00Z, OSIRIS-APEX at 2026-04-27T20:00Z, and BepiColombo at 2026-04-25T02:00Z (plus minus 7 hours).
Links to the movies of the modeled event (includes CME: 2026-04-24T08:24:00-CME-001):
This CME event (2026-04-24T08:24:00-CME-001) is associated with X2.5 flare from Active Region 14419 (N16W70) with ID 2026-04-24T08:01:00-FLR-001 which peaked at 2026-04-24T08:13Z (see notifications 20260424-AL-004, 20260424-AL-005).
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 - X2.5 Flare
##
## Message Issue Date: 2026-04-24T11:10:06Z
## Message ID: 20260424-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:
Significant flare detected by GOES.
Flare start time: 2026-04-24T08:01Z.
Flare peak time: 2026-04-24T08:13Z.
Flare intensity: X2.5 class.
Source region: N16W70 (Active Region 14419) (based on SDO 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: 2026-04-24T08:14:53Z
## Message ID: 20260424-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:
Significant flare detected by GOES. Flare intensity has crossed the threshold of M5.0.
Flare M5.0 crossing time: 2026-04-24T08:11Z.
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 (Juice, STEREO A, BepiColombo)
##
## Message Issue Date: 2026-04-24T03:22:41Z
## Message ID: 20260424-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:
C-type CME detected by GOES / SOHO.
Start time of the event: 2026-04-24T01:24Z.
Estimated speed: ~905 km/s.
Estimated opening half-angle: 45 deg.
Direction (lon./lat.): 68/45 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-04-24T01:24:00-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 Juice, STEREO A, and BepiColombo (glancing blow). The leading edge of the CME will reach Juice at 2026-04-27T13:13Z and STEREO A at 2026-04-26T03:13Z, and its flank will reach BepiColombo at 2026-04-24T21:00Z (plus minus 7 hours).
Links to the movies of the modeled event (includes CME: 2026-04-24T01:24:00-CME-001):
This CME event (2026-04-24T01:24:00-CME-001) is associated with X2.4 flare from Active Region 14419 (N16W68) with ID 2026-04-24T00:51:00-FLR-001 which peaked at 2026-04-24T01:07Z (see notifications 20260424-AL-001, 20260424-AL-002).
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 - X2.4 Flare
##
## Message Issue Date: 2026-04-24T01:25:17Z
## Message ID: 20260424-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 start time: 2026-04-24T00:51Z.
Flare peak time: 2026-04-24T01:07Z.
Flare intensity: X2.4 class.
Source region: N16W68 (Active Region 14419) (based on SDO 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: 2026-04-24T01:08:46Z
## Message ID: 20260424-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:
Significant flare detected by GOES. Flare intensity has crossed the threshold of M5.0.
Flare M5.0 crossing time: 2026-04-24T01:04Z.
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 - Continued Radiation Belt Enhancement
##
## Message Issue Date: 2026-04-23T18:50:49Z
## Message ID: 20260423-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:
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 2026-04-23T13:15Z.
The elevated energetic electron flux levels observed since 2026-04-19T14:00Z are caused by a coronal hole high speed stream starting on 2026-04-18, reaching maximum sustained speeds of approximately 570 km/s. The solar wind speed observed at L1 is currently around 430 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.
Activity ID: 2026-04-19T14:00:00-RBE-001.
## Notes:
This coronal hole high speed stream is also associated with the moderate geomagnetic storm with ID 2026-04-18T06:00:00-GST-001 (see notifications 20260418-AL-001, 20260418-AL-002, 20260419-AL-001).
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - CME (Missions Near Earth)
##
## Message Issue Date: 2026-04-23T18:37:02Z
## Message ID: 20260423-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:
C-type CME detected by STEREO A / GOES / SOHO.
Start time of the event: 2026-04-23T12:08Z.
Estimated speed: ~621 km/s.
Estimated opening half-angle: 14 deg.
Direction (lon./lat.): -20/14 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-04-23T12:08:00-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 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 2026-04-26T20:00Z (plus minus 7 hours). The roughly estimated expected range of the maximum Kp index is 2-4 (below minor).
Links to the movies of the modeled event (includes CME: 2026-04-23T12:08:00-CME-001):
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - CME (Juice, STEREO A, Europa Clipper, OSIRIS-APEX)
##
## Message Issue Date: 2026-04-23T18:24:53Z
## Message ID: 20260423-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 / GOES / SOHO.
Start time of the event: 2026-04-23T09:12Z.
Estimated speed: ~851 km/s.
Estimated opening half-angle: 31 deg.
Direction (lon./lat.): 49/28 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-04-23T09:12:00-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 CME may impact Juice, STEREO A, Europa Clipper (glancing blow), and OSIRIS-APEX (glancing blow). The leading edge of the CME will reach Juice at 2026-04-26T23:37Z and STEREO A at 2026-04-25T10:37Z. The flank of the CME may reach Europa Clipper at 2026-04-28T02:00Z and OSIRIS-APEX at 2026-04-26T12:00Z (plus minus 7 hours).
Links to the movies of the modeled event (includes CME: 2026-04-23T09:12:00-CME-001):
This CME event (2026-04-23T09:12:00-CME-001) is associated with an M4.3 flare from Active Region 14419 (N15W61) with ID 2026-04-23T08:43:00-FLR-001 which peaked at 2026-04-23T08:48Z.
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 (Juice, STEREO A)
##
## Message Issue Date: 2026-04-23T18:20:14Z
## Message ID: 20260423-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:
C-type CME detected by GOES / SOHO.
Start time of the event: 2026-04-22T23:24Z.
Estimated speed: ~849 km/s.
Estimated opening half-angle: 19 deg.
Direction (lon./lat.): 53/31 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-04-22T23:24:00-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 Juice (glancing blow) and STEREO A (glancing blow). The flank of the CME may reach Juice at 2026-04-26T20:00Z and STEREO A at 2026-04-25T08:00Z (plus minus 7 hours).
Links to the movies of the modeled event (includes CME: 2026-04-22T23:24:00-CME-001):
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - CME (STEREO A, Juice)
##
## Message Issue Date: 2026-04-23T18:07:51Z
## Message ID: 20260423-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:
C-type CME detected by STEREO A / GOES / SOHO.
Start time of the event: 2026-04-23T05:00Z.
Estimated speed: ~947 km/s.
Estimated opening half-angle: 24 deg.
Direction (lon./lat.): 52/31 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-04-23T05:00:00-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 STEREO A and Juice (glancing blow). The leading edge of the CME will reach STEREO A at 2026-04-25T09:00Z and the flank of the CME may reach Juice at 2026-04-26T20:00Z (plus minus 7 hours).
Links to the movies of the modeled event (includes CME: 2026-04-23T05:00:00-CME-001):
This CME event (2026-04-23T05:00:00-CME-001) is associated with an M1.6 flare from Active Region 14419 (N15W60) with ID 2026-04-23T04:31:00-FLR-001 which peaked at 2026-04-23T04:35Z.
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 (Europa Clipper, OSIRIS-APEX, Missions Near Earth)
##
## Message Issue Date: 2026-04-23T18:00:03Z
## Message ID: 20260423-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 STEREO A / GOES / SOHO.
Start time of the event: 2026-04-23T05:12Z.
Estimated speed: ~889 km/s.
Estimated opening half-angle: 38 deg.
Direction (lon./lat.): -40/16 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-04-23T05:12:00-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 Europa Clipper (glancing blow) and OSIRIS-APEX (glancing blow). The leading edge or flank of the CME will reach Europa Clipper at 2026-04-29T06:00Z and OSIRIS-APEX at 2026-04-27T03:00Z (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 2026-04-26T00:45Z (plus minus 7 hours). The roughly estimated expected range of the maximum Kp index is 3-5 (below minor to minor).
Links to the movies of the modeled event (includes CME: 2026-04-23T05:12:00-CME-001):
This CME event (2026-04-23T05:12:00-CME-001) is associated with M1.2 flare from Active Region 14420 (N16E40) with ID 2026-04-23T04:41:00-FLR-001 which peaked at 2026-04-23T04:44Z and M1.2 flare from Active Region 14420 (N16E35) with ID 2026-04-23T04:50:00-FLR-001 which peaked at 2026-04-23T04:59Z.
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
