Ειδοποιήσεις από το σύστημα έγκαιρης προειδοποίησης DONKI της NASA (διαστημικός καιρός, Ήλιος)
NASA DONKI Notifications
NASA DONKI Notifications
Message Type: RBE
Message ID: 20260411-AL-001
Issue Time: 2026-04-11T12:32Z
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - Radiation Belt Enhancement
##
## Message Issue Date: 2026-04-11T12:32:55Z
## Message ID: 20260411-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 is above 1000 pfu starting at 2026-04-10T13:55Z.
The elevated energetic electron flux levels are caused by the arrival of a coronal hole high speed stream which started on 2026-04-10, reaching maximum sustained speeds of approximately 620 km/s. The solar wind speed observed at L1 is currently around 560 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: 2026-04-10T13:55:00-RBE-001.
## Notes:
Previously elevated energetic electron flux levels observed since 2026-04-03T09:05Z were associated with the coronal hole high speed stream detected by ACE and DSCOVR at L1 on 2026-04-02 (see notifications 20260403-AL-002, 20260405-AL-001, 20260407-AL-001, and 20260409-AL-001).
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - CME (BepiColombo, Juice, Parker Solar Probe, STEREO A)
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## Message Issue Date: 2026-04-10T10:04:07Z
## Message ID: 20260410-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:
C-type CME detected by STEREO A / GOES / SOHO.
Start time of the event: 2026-04-10T06:09Z.
Estimated speed: ~763 km/s.
Estimated opening half-angle: 18 deg.
Direction (lon./lat.): 85/-2 in Heliocentric Earth Equatorial coordinates.
Activity ID: 2026-04-10T06:09:00-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, Juice (minor impact), Parker Solar Probe (glancing blow), and STEREO A (glancing blow).
The leading edge of the CME will reach BepiColombo at 2026-04-11T07:18Z and Juice at 2026-04-15T11:00Z. The flank of the CME will reach Parker Solar Probe at 2026-04-12T00:00Z and STEREO A at 2026-04-13T09:00Z (plus minus 7 hours).
Links to the movies of the modeled event (includes CME: 2026-04-10T06:09:00-CME-001):
Message Body: ## Community Coordinated Modeling Center Database Of Notifications, Knowledge, Information ( CCMC DONKI )
## Message Type: Space Weather Notification - Interplanetary Shock
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## Message Issue Date: 2026-04-10T07:29:19Z
## Message ID: 20260410-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:
Significant interplanetary shock detected by ACE and DSCOVR at L1 at 2026-04-10T06:20Z.
The shock may be associated with the arrival of a coronal hole high speed stream starting on 2026-04-09. Some magnetospheric compression likely and geomagnetic storm possible.
Activity ID: 2026-04-10T06:20:00-IPS-001.
## Notes:
The cause of this event is under analysis and this arrival signature is still developing.
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: 2026-04-09T09:40:19Z
## Message ID: 20260409-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 2026-04-08T01:10Z.
The elevated energetic electron flux levels observed since 2026-04-03T09:05Z (see notifications 20260403-AL-002, 20260405-AL-001, 20260407-AL-001) are likely caused by the coronal hole high speed stream detected by ACE at L1 on 2026-04-02, reaching maximum sustained speeds of approximately 700 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.
