Ειδοποιήσεις από το σύστημα έγκαιρης προειδοποίησης DONKI της NASA (διαστημικός καιρός, Ήλιος)
NASA DONKI Notifications
NASA DONKI Notifications
Message Type: CME
Message ID: 20260523-AL-001
Issue Time: 2026-05-23T19:35Z
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - CMEs (Parker Solar Probe, STEREO A, Juice)
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## Message Issue Date: 2026-05-23T19:35:24Z
## Message ID: 20260523-AL-001
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## 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: 2026-05-23T16:00Z.
Estimated speed: ~680 km/s.
Estimated opening half-angle: 32 deg.
Direction (lon./lat.): 83/29 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-05-23T16:00:00-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 Parker Solar Probe, STEREO A, and Juice (glancing blow). The flank of the CME will reach Parker Solar Probe at 2026-05-24T19:22Z and another flank will reach STEREO A at 2026-05-26T13:26Z and Juice at 2026-05-28T20:00Z (plus minus 7 hours).
Links to the movies of the modeled event (includes CMEs: 2026-05-23T16:00:00-CME-001 and 2026-05-23T06:48:00-CME-001):
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - Continued Radiation Belt Enhancement
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## Message Issue Date: 2026-05-22T15:50:17Z
## Message ID: 20260522-AL-002
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## 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 2026-05-22T10:25Z.
The elevated energetic electron flux levels observed since 2026-05-16T15:20Z (see notifications 20260516-AL-003, 20260516-AL-004, 20260518-AL-001, and 20260520-AL-001) are caused by the arrival of a coronal hole high speed stream which started on 2026-05-15, reaching maximum sustained speeds of approximately 740 km/s. The solar wind speed observed at L1 is currently around 360 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: 2026-05-16T15:20:00-RBE-001.
## Notes:
This coronal hole high speed stream is also associated with interplanetary shock with ID 2026-05-15T07:14:00-IPS-001 (see notification 20260515-AL-001) and geomagnetic storm with ID 2026-05-15T21:00:00-GST-001 (see notifications 20260516-AL-001, 20260516-AL-002).
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - CME (Parker Solar Probe)
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## Message Issue Date: 2026-05-22T13:51:46Z
## Message ID: 20260522-AL-001
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## 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: 2026-05-22T10:48Z.
Estimated speed: ~594 km/s.
Estimated opening half-angle: 28 deg.
Direction (lon./lat.): 95/35 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-05-22T10:48:00-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 Parker Solar Probe. The leading edge of the CME will reach Parker Solar Probe at 2026-05-23T18:09Z (plus minus 7 hours).
Links to the movies of the modeled event (includes CME: 2026-05-22T10:48:00-CME-001):
This CME event (2026-05-22T10:48:00-CME-001) is associated with M2.3 flare with ID 2026-05-22T10:03:00-FLR-001 from Active Region 14436 (N18W96) which peaked at 2026-05-22T10:29Z.
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 (Juice, STEREO A)
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## Message Issue Date: 2026-05-21T12:40:28Z
## Message ID: 20260521-AL-001
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## 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 2026-05-20T17:15:00-CME-001 (see previous notification 20260520-AL-002). 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 and STEREO A. The leading edge of the CME may reach Juice at 2026-05-24T11:19Z and STEREO A at 2026-05-22T22:16Z (plus minus 7 hours).
Updated CME parameters are (C-type):
Start time of the event: 2026-05-20T17:15Z.
Estimated speed: ~661 km/s.
Estimated opening half-angle: 22 deg.
Direction (lon./lat.): 53/16 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-05-20T17:15:00-CME-001
Links to the movies of the modeled event (includes CME: 2026-05-20T17:15:00-CME-001):
